zoukankan      html  css  js  c++  java
  • 慕课网-安卓攻城狮视频学习及练习(一)

    初学安卓,次次卡在button的事件监听处。这次要一鼓作气,把这个处理点击事件的机制看得赤裸裸!

     1 public void onCreate(Bundle savedInstanceState) {
     2         super.onCreate(savedInstanceState);
     3         setContentView(R.layout.activity_main);
     4         btndo=(Button)findViewById(R.id.button1);
     5         txtShow=(TextView)findViewById(R.id.textView1);
     6         btndo.setOnClickListener(btndoListener);
     7 
     8     }
     9 
    10 private Button.OnClickListener btndoListener=new
    11 Button.OnClickListener(){
    12     public void onClick (View v){
    13         txtShow.setText("你按到我了!");
    14     }
    15 };

    匿名内部类:

    public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            btndo=(Button)findViewById(R.id.button1);
            txtShow=(TextView)findViewById(R.id.textView1);
            btndo.setOnClickListener(new OnClickListener(){
                public void onClick (View v){
                    txtShow.setText("你按到我了!");
                }
                });
    
        }

    英里转换器

     1 private Button btndo;
     2     private TextView txtShow;
     3     private EditText editdo;
     4     @Override
     5     public void onCreate(Bundle savedInstanceState) {
     6         super.onCreate(savedInstanceState);
     7         setContentView(R.layout.activity_main);
     8         btndo=(Button)findViewById(R.id.button1);
     9         txtShow=(TextView)findViewById(R.id.textView2);
    10         editdo=(EditText)findViewById(R.id.editView1);
    11         btndo.setOnClickListener(new OnClickListener(){
    12             public void onClick (View v){
    13                 int miles=Integer.parseInt(editdo.getText().toString());
    14                 double km =1.61*(double)miles;
    15                 txtShow.setText("时速"+km+"公里");
    16             }
    17             });
    18 
    19 
    20     }

    多按钮共享事件 switch的应用

     1 public void onCreate(Bundle savedInstanceState) {
     2         super.onCreate(savedInstanceState);
     3         setContentView(R.layout.activity_main);
     4         bt1=(Button)findViewById(R.id.button1);
     5         bt2=(Button)findViewById(R.id.button2);
     6         bt3=(Button)findViewById(R.id.button3);
     7         text1=(TextView)findViewById(R.id.textView1);
     8 
     9         bt1.setOnClickListener(myListener);
    10         bt2.setOnClickListener(myListener);
    11         bt3.setOnClickListener(myListener);
    12 
    13     }       
    14             private Button.OnClickListener myListener=new 
    15                     Button.OnClickListener(){
    16 
    17                 public void onClick(View v){
    18                     String s=text1.getText().toString();
    19                     switch(v.getId()){
    20                     case R.id.button1:
    21                     text1.setText(s+"0");
    22                     break;
    23 
    24                     case R.id.button2:
    25                     {text1.setText(s+"1");
    26                     break;
    27                     }
    28                     case R.id.button3:
    29                     {text1.setText(s+"2");
    30                     break;
    31                     }
    32                     }
    33                 }
    34 
    35             };

    tablelayout

     1 public class MainActivity extends Activity {
     2         private EditText edit1;
     3         private Button b1,b2,b3,b4,b5,b6;
     4     @Override
     5     public void onCreate(Bundle savedInstanceState) {
     6 
     7         super.onCreate(savedInstanceState);
     8         setContentView(R.layout.activity_main);
     9         edit1=(EditText)findViewById(R.id.editText1);
    10         b1=(Button)findViewById(R.id.button1);
    11         b2=(Button)findViewById(R.id.button2);
    12         b3=(Button)findViewById(R.id.button3);
    13         b4=(Button)findViewById(R.id.button4);
    14         b5=(Button)findViewById(R.id.button5);
    15         b6=(Button)findViewById(R.id.button6);
    16      b1.setOnClickListener(listener);
    17      b2.setOnClickListener(listener);
    18      b3.setOnClickListener(listener);
    19      b4.setOnClickListener(listener);
    20      b5.setOnClickListener(listener);
    21      b6.setOnClickListener(listener);
    22 
    23 
    24     }       
    25 
    26     private Button.OnClickListener listener =new 
    27             Button.OnClickListener() {
    28 
    29                 @Override
    30                 public void onClick(View v) {
    31                     // TODO Auto-generated method stub
    32                     switch (v.getId()) {
    33                     case R.id.button1:
    34                         displayATM("1");
    35                         break;
    36                     case R.id.button2:
    37                         displayATM("2");
    38                         break;
    39                     case R.id.button3:
    40                         displayATM("3");
    41                         break;
    42                     case R.id.button4:
    43                         displayATM("4");
    44                         break;
    45                     case R.id.button5:
    46                         displayATM("5");
    47                         break;
    48                     case R.id.button6:
    49                         displayATM("6");
    50                         break;
    51 
    52                     default:
    53                         break;
    54                     }
    55                 }
    56             };
    57             private void displayATM(String s){
    58                 String str=edit1.getText().toString();
    59                 edit1.setText(str+s);
    60             }

    这里写图片描述

    **4.2**toast 弹出消息

     1 public void onCreate(Bundle savedInstanceState) {
     2 
     3         super.onCreate(savedInstanceState);
     4         setContentView(R.layout.activity_main);
     5         edit1=(EditText)findViewById(R.id.editText1);
     6         b1=(Button)findViewById(R.id.button1);
     7         b2=(Button)findViewById(R.id.button2);
     8         b3=(Button)findViewById(R.id.button3);
     9         b4=(Button)findViewById(R.id.button4);
    10         b5=(Button)findViewById(R.id.button5);
    11         b6=(Button)findViewById(R.id.button6);
    12         b7=(Button)findViewById(R.id.button7);
    13         b8=(Button)findViewById(R.id.button8);
    14 
    15      b1.setOnClickListener(listener);
    16      b2.setOnClickListener(listener);
    17      b3.setOnClickListener(listener);
    18      b4.setOnClickListener(listener);
    19      b5.setOnClickListener(listener);
    20      b6.setOnClickListener(listener);
    21      b7.setOnClickListener(listener);
    22      b8.setOnClickListener(listener);
    23 
    24 
    25 
    26     }       
    27 
    28     private Button.OnClickListener listener =new 
    29             Button.OnClickListener() {
    30 
    31                 @Override
    32                 public void onClick(View v) {
    33                     // TODO Auto-generated method stub
    34                     switch (v.getId()) {
    35                     case R.id.button1:
    36                         displayATM("1");
    37                         break;
    38                     case R.id.button2:
    39                         displayATM("2");
    40                         break;
    41                     case R.id.button3:
    42                         displayATM("3");
    43                         break;
    44                     case R.id.button4:
    45                         displayATM("4");
    46                         break;
    47                     case R.id.button5:
    48                         displayATM("5");
    49                         break;
    50                     case R.id.button6:
    51                         displayATM("6");
    52                         break;
    53                     case R.id.button7:{
    54                         String str=edit1.getText().toString();
    55                         if (str.length()>0){
    56                             str=str.substring(0,str.length()-1);
    57                             edit1.setText(str);
    58                         }
    59                     }
    60                     case R.id.button8:{
    61                          String str=edit1.getText().toString();
    62                         if (str.equals("667788")){
    63                             Toast toast =Toast.makeText(MainActivity.this, "密码正确,欢迎使用提款功能", Toast.LENGTH_LONG);
    64                         toast.show();   
    65                         }
    66                         else{
    67                             Toast toast =Toast.makeText(MainActivity.this, "密码错误,请重新输入", Toast.LENGTH_LONG);
    68                             toast.show();
    69                         }
    70 
    71                     }
    72                     default:
    73                         break;
    74                     }
    75                 }
    76             };
    77             private void displayATM(String s){
    78                 String str=edit1.getText().toString();
    79                 edit1.setText(str+s);
    80             }

    这里写图片描述

    2)消息提示中央呈现

     1 case R.id.button8:{
     2                          String str=edit1.getText().toString();
     3                         if (str.equals("123456")){
     4                             Toast toast =Toast.makeText(MainActivity.this, "密码正确,欢迎使用提款功能", Toast.LENGTH_LONG);
     5                         toast.show();   
     6                         toast.setGravity(Gravity.CENTER, 0, 0);
     7                         }
     8                         else{
     9                             Toast toast =Toast.makeText(MainActivity.this, "密码错误,请重新输入", Toast.LENGTH_LONG);
    10                             toast.show();
    11                             toast.setGravity(Gravity.CENTER, 0, 0);
    12 
    13                         }
    14 
    15                     }

    这里写图片描述

    4.3 alertdialog对话框

    1 case R.id.button9:{
    2                         new AlertDialog.Builder(MainActivity.this)
    3                         .setTitle("确认窗口")
    4                         .setIcon(R.drawable.ic_launcher)
    5                         .setMessage("确定要结束程序?")
    6                         .show();
    7                     }

    这里写图片描述
    2)加入交互按钮

     1 case R.id.button9:{
     2                         new AlertDialog.Builder(MainActivity.this)
     3                         .setTitle("确认窗口")
     4                         .setIcon(R.drawable.ic_launcher)
     5                         .setMessage("确定要结束程序?")
     6                         .setPositiveButton("确定", new  DialogInterface.OnClickListener() {
     7 
     8                             public void onClick(DialogInterface dialog, int which) {
     9 
    10                                 finish();
    11                             }
    12                         })
    13                         .setNegativeButton("取消", new  DialogInterface.OnClickListener() {
    14 
    15                             public void onClick(DialogInterface dialog, int which) {
    16 
    17 
    18                             }
    19                         })
    20                         .show();
    21                         break;
    22                     }

    这里写图片描述

    一道练习题

      1 package com.twomeng.meng;
      2 
      3 import android.R.raw;
      4 import android.app.Activity;
      5 import android.app.AlertDialog;
      6 import android.content.DialogInterface;
      7 import android.location.GpsStatus.Listener;
      8 import android.os.Bundle;
      9 import android.view.View;
     10 import android.view.View.OnClickListener;
     11 import android.widget.Button;
     12 import android.widget.EditText;
     13 import android.view.Gravity;
     14 import android.view.Menu;
     15 import android.view.MenuItem;
     16 import android.widget.TextView;
     17 import android.widget.Toast;
     18 public class MainActivity extends Activity {
     19         private Button b1,b2,b3,b4;
     20     @Override
     21     public void onCreate(Bundle savedInstanceState) {
     22 
     23         super.onCreate(savedInstanceState);
     24         setContentView(R.layout.activity_main);
     25         b1=(Button)findViewById(R.id.button1);
     26         b2=(Button)findViewById(R.id.button2);
     27         b3=(Button)findViewById(R.id.button3);
     28         b4=(Button)findViewById(R.id.button4);
     29 
     30 b1.setOnClickListener(Listener);
     31 b2.setOnClickListener(Listener);
     32 b3.setOnClickListener(Listener);
     33 b4.setOnClickListener(Listener);
     34     }       
     35 
     36     private Button.OnClickListener Listener=
     37             new OnClickListener() {
     38 
     39                 @Override
     40                 public void onClick(View v) {
     41 
     42                     switch (v.getId()) {
     43                     case R.id.button1:
     44                         new AlertDialog.Builder(MainActivity.this)
     45                         .setTitle("确认窗口")
     46                         .setIcon(R.drawable.ic_launcher)
     47                         .setMessage("你按了button1,按确定关闭对话框")
     48                         .setPositiveButton("确定", new DialogInterface.OnClickListener() {
     49 
     50                             @Override
     51                             public void onClick(DialogInterface dialog, int which) {
     52                                 finish();
     53 
     54                             }
     55                         })
     56                         .show();
     57                         break;
     58                     case R.id.button2:new AlertDialog.Builder(MainActivity.this)
     59                     .setTitle("确认窗口")
     60                     .setIcon(R.drawable.ic_launcher)
     61                     .setMessage("你按了button2,按确定关闭对话框")
     62                     .setPositiveButton("确定", new DialogInterface.OnClickListener() {
     63 
     64                         @Override
     65                         public void onClick(DialogInterface dialog, int which) {
     66                             finish();
     67 
     68                         }
     69                     })
     70                     .show();
     71                         break;
     72                     case R.id.button3:
     73                         new AlertDialog.Builder(MainActivity.this)
     74                         .setTitle("确认窗口")
     75                         .setIcon(R.drawable.ic_launcher)
     76                         .setMessage("你按了button3,按确定关闭对话框")
     77                         .setPositiveButton("确定", new DialogInterface.OnClickListener() {
     78 
     79                             @Override
     80                             public void onClick(DialogInterface dialog, int which) {
     81                                 finish();
     82 
     83                             }
     84                         })
     85                         .show();
     86                         break;
     87 
     88                     case R.id.button4:
     89                         new AlertDialog.Builder(MainActivity.this)
     90                         .setTitle("确认窗口")
     91                         .setIcon(R.drawable.ic_launcher)
     92                         .setMessage("你按了button4,按确定关闭对话框")
     93                         .setPositiveButton("确定", new DialogInterface.OnClickListener() {
     94 
     95                             @Override
     96                             public void onClick(DialogInterface dialog, int which) {
     97                                 finish();
     98 
     99                             }
    100                         })
    101                         .show();
    102                         break;
    103                     }
    104                 }
    105             };
    106 
    107     @Override
    108     public boolean onCreateOptionsMenu(Menu menu) {
    109         // Inflate the menu; this adds items to the action bar if it is present.
    110         getMenuInflater().inflate(R.menu.main, menu);
    111         return true;
    112     }
    113 
    114     @Override
    115     public boolean onOptionsItemSelected(MenuItem item) {
    116         // Handle action bar item clicks here. The action bar will
    117         // automatically handle clicks on the Home/Up button, so long
    118         // as you specify a parent activity in AndroidManifest.xml.
    119         int id = item.getItemId();
    120         if (id == R.id.action_settings) {
    121             return true;
    122         }
    123         return super.onOptionsItemSelected(item);
    124     }
    125 }

    这里写图片描述

    第五章 单选、复选和下拉列表

     1 private TextView text1;
     2     private CheckBox check1,check2,check3;
     3 
     4     public void onCreate(Bundle savedInstanceState) {
     5 
     6         super.onCreate(savedInstanceState);
     7         setContentView(R.layout.activity_main);
     8         text1=(TextView)findViewById(R.id.textView1);
     9         check1=(CheckBox)findViewById(R.id.check1);
    10         check2=(CheckBox)findViewById(R.id.check2);
    11         check3=(CheckBox)findViewById(R.id.check3);
    12 
    13         check1.setOnCheckedChangeListener(listener);
    14         check2.setOnCheckedChangeListener(listener);
    15         check3.setOnCheckedChangeListener(listener);
    16 
    17     }
    18     private CheckBox.OnCheckedChangeListener listener =
    19             new CheckBox.OnCheckedChangeListener() {
    20 
    21                 public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    22                 int n=0;
    23                 String s="";
    24                 String s1="",s2="",s3="";
    25                 if (check1.isChecked()){
    26                     n++;
    27                     s1=check1.getText().toString()+" ";
    28                 }
    29                 else{
    30                     s1="";
    31                 }
    32                 if (check2.isChecked()){
    33                     n++;
    34                     s2=check2.getText().toString()+" ";
    35                 }
    36                 else{
    37                     s2="";
    38                 }
    39                 if (check3.isChecked()){
    40                     n++;
    41                     s3=check3.getText().toString()+" ";
    42                 }
    43                 else{
    44                     s3="";
    45                 }
    46                 s=s1+s2+s3;
    47                 text1.setText("最喜欢的球类有:"+s+""+n+"");
    48 
    49                 }
    50             };

    这里写图片描述

    2)水平的复选框

     1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     2     xmlns:tools="http://schemas.android.com/tools"
     3     android:layout_width="match_parent"
     4     android:layout_height="match_parent"
     5     android:orientation="vertical" >
     6 
     7     <TextView
     8         android:layout_width="fill_parent"
     9         android:layout_height="wrap_content"
    10         android:text="我最喜欢的球类运动"
    11         android:textSize="20sp" />
    12 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    13     xmlns:tools="http://schemas.android.com/tools"
    14     android:layout_width="wrap_content"
    15     android:layout_height="wrap_content"
    16     android:orientation="horizontal" >
    17     <CheckBox
    18         android:id="@+id/check1"
    19         android:layout_width="fill_parent"
    20         android:layout_height="wrap_content"
    21         android:text="篮球"
    22         android:textSize="20sp" />
    23 
    24     <CheckBox
    25         android:id="@+id/check2"
    26         android:layout_width="fill_parent"
    27         android:layout_height="wrap_content"
    28         android:text="足球"
    29         android:textSize="20sp" />
    30 
    31     <CheckBox
    32         android:id="@+id/check3"
    33         android:layout_width="fill_parent"
    34         android:layout_height="wrap_content"
    35         android:text="棒球"
    36         android:textSize="20sp" />
    37 </LinearLayout>
    38     <TextView
    39         android:id="@+id/textView1"
    40         android:layout_width="fill_parent"
    41         android:layout_height="wrap_content"
    42         android:text="显示消息"
    43         android:textSize="20sp" />
    44 
    45 </LinearLayout>

    这里写图片描述

    5.2 radiobutton radiogroup单选列表

     1 private TextView text1;
     2     private RadioGroup group;
     3     private RadioButton button1,button2,button3;
     4     public void onCreate(Bundle savedInstanceState) {
     5         super.onCreate(savedInstanceState);
     6         setContentView(R.layout.activity_main);
     7         text1=(TextView)findViewById(R.id.textView1);
     8         group=(RadioGroup)findViewById(R.id.radioGroup1);
     9         button1=(RadioButton)findViewById(R.id.radio0);
    10         button2=(RadioButton)findViewById(R.id.radio1);
    11         button3=(RadioButton)findViewById(R.id.radio2);
    12         group.setOnCheckedChangeListener(listener);
    13 
    14     }
    15     private RadioGroup.OnCheckedChangeListener listener=
    16             new RadioGroup.OnCheckedChangeListener() {
    17 
    18                 public void onCheckedChanged(RadioGroup group, int checkedId) {
    19 int p=group.indexOfChild((RadioButton)findViewById(checkedId));
    20 int count=group.getChildCount();
    21 if(checkedId==R.id.radio0)
    22     text1.setText(count+"项球类中,最喜欢第"+(p+1)+""+button1.getText());
    23 if(checkedId==R.id.radio1)
    24     text1.setText(count+"项球类中,最喜欢第"+(p+1)+""+button2.getText());
    25 if(checkedId==R.id.radio2)
    26     text1.setText(count+"项球类中,最喜欢第"+(p+1)+""+button3.getText());
    27                 }
    28             };
    这里写图片描述

    2)水平单选框

     1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     2     xmlns:tools="http://schemas.android.com/tools"
     3     android:layout_width="match_parent"
     4     android:layout_height="match_parent"
     5     android:orientation="vertical" >
     6 
     7     <TextView
     8         android:layout_width="fill_parent"
     9         android:layout_height="wrap_content"
    10         android:text="我最喜欢的球类运动"
    11         android:textSize="20sp" />
    12 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    13     xmlns:tools="http://schemas.android.com/tools"
    14     android:layout_width="wrap_content"
    15     android:layout_height="wrap_content"
    16     android:orientation="horizontal" >
    17     <RadioGroup android:orientation="horizontal"
    18         android:id="@+id/radioGroup1"
    19         android:layout_width="fill_parent"
    20         android:layout_height="wrap_content" >
    21 
    22         <RadioButton
    23             android:id="@+id/radio0"
    24             android:layout_width="fill_parent"
    25             android:layout_height="wrap_content"
    26             android:text="篮球" />
    27 
    28         <RadioButton
    29             android:id="@+id/radio1"
    30             android:text="足球"
    31             android:layout_width="fill_parent"
    32             android:layout_height="wrap_content"
    33              />
    34 
    35         <RadioButton
    36             android:id="@+id/radio2"
    37             android:text="棒球"
    38             android:layout_width="fill_parent"
    39             android:layout_height="wrap_content"
    40             />
    41     </RadioGroup>
    42 </LinearLayout>
    43 
    44     <TextView
    45         android:id="@+id/textView1"
    46         android:layout_width="fill_parent"
    47         android:layout_height="wrap_content"
    48         android:text="显示消息"
    49         android:textSize="20sp" />
    50 
    51 </LinearLayout>

    这里写图片描述

    5.3 spinner 下拉式列表

    package com.twomeng.meng;
    
    import org.apache.http.conn.BasicEofSensorWatcher;
    
    import android.R.raw;
    import android.app.Activity;
    import android.app.AlertDialog;
    import android.content.DialogInterface;
    import android.location.GpsStatus.Listener;
    import android.os.Bundle;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Adapter;
    import android.widget.AdapterView;
    import android.widget.AdapterView.OnItemSelectedListener;
    import android.widget.ArrayAdapter;
    import android.widget.Button;
    import android.widget.CheckBox;
    import android.widget.CompoundButton;
    import android.widget.EditText;
    import android.widget.RadioButton;
    import android.widget.RadioGroup;
    import android.widget.Spinner;
    import android.view.Gravity;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.widget.TextView;
    import android.widget.Toast;
    public class MainActivity extends Activity {
    
        private TextView text1;
        private Spinner spinner;
        String[] Balls=new String[]{"篮球","足球","棒球","其他"};
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            text1=(TextView)findViewById(R.id.textView1);
            spinner=(Spinner)findViewById(R.id.spinner1);
    
            spinner=(Spinner)findViewById(R.id.spinner1);
            ArrayAdapter<String> adapterballs=new ArrayAdapter<String>
            (this, android.R.layout.simple_spinner_item,Balls);
    
            adapterballs.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    
            spinner.setAdapter(adapterballs);
    
            spinner.setOnItemSelectedListener(listener);
        }
    
    
                private Spinner.OnItemSelectedListener listener =
                        new Spinner.OnItemSelectedListener() {
    
                        public void onItemSelected(AdapterView<?> parent,View v,int position,long id ){
                            String string=parent.getSelectedItem().toString();
                            text1.setText(string);
    
                        }
                        public void onNothingSelected(AdapterView<?> parent ){
    
                            }
                        };
    
    }

    这里写图片描述

    练习

     1 package com.twomeng.meng;
     2 
     3 import org.apache.http.conn.BasicEofSensorWatcher;
     4 
     5 import android.R.raw;
     6 import android.app.Activity;
     7 import android.app.AlertDialog;
     8 import android.content.DialogInterface;
     9 import android.location.GpsStatus.Listener;
    10 import android.os.Bundle;
    11 import android.view.View;
    12 import android.view.View.OnClickListener;
    13 import android.widget.Adapter;
    14 import android.widget.AdapterView;
    15 import android.widget.AdapterView.OnItemSelectedListener;
    16 import android.widget.ArrayAdapter;
    17 import android.widget.Button;
    18 import android.widget.CheckBox;
    19 import android.widget.CompoundButton;
    20 import android.widget.CompoundButton.OnCheckedChangeListener;
    21 import android.widget.EditText;
    22 import android.widget.RadioButton;
    23 import android.widget.RadioGroup;
    24 import android.widget.Spinner;
    25 import android.view.Gravity;
    26 import android.view.Menu;
    27 import android.view.MenuItem;
    28 import android.widget.TextView;
    29 import android.widget.Toast;
    30 public class MainActivity extends Activity {
    31 
    32     private TextView textView;
    33     private CheckBox check1,check2,check3;
    34 
    35 
    36     public void onCreate(Bundle savedInstanceState) {
    37         super.onCreate(savedInstanceState);
    38         setContentView(R.layout.activity_main);
    39         textView=(TextView)findViewById(R.id.textView2);
    40         check1=(CheckBox)findViewById(R.id.checkBox1);
    41         check2=(CheckBox)findViewById(R.id.checkBox2);
    42         check3=(CheckBox)findViewById(R.id.checkBox3);
    43 
    44         check1.setOnCheckedChangeListener(listener);
    45         check2.setOnCheckedChangeListener(listener);
    46         check3.setOnCheckedChangeListener(listener);
    47 
    48     }
    49     private CheckBox.OnCheckedChangeListener listener=
    50             new OnCheckedChangeListener() {
    51 
    52                 @Override
    53                 public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    54                     int n=0;
    55                     String string;
    56                     String s1,s2,s3;
    57                     if (check1.isChecked()){
    58                         n++;
    59                         s1=check1.getText().toString();
    60 
    61                     }
    62                     else
    63                         s1=" ";
    64                     if (check2.isChecked()){
    65                         n++;
    66                         s2=check2.getText().toString();
    67 
    68                     }
    69                     else
    70                         s2=" ";
    71                     if (check3.isChecked()){
    72                         n++;
    73                         s3=check3.getText().toString();
    74 
    75                     }
    76                     else
    77                         s3=" ";
    78 
    79                     string=s1+s2+s3;
    80                     textView.setText("最喜欢的程序语言有:"+string+""+n+"");
    81                 }
    82             };
    83 
    84 
    85 
    86 }
    这里写图片描述
     1 package com.twomeng.meng;
     2 
     3 import org.apache.http.conn.BasicEofSensorWatcher;
     4 
     5 import android.R.raw;
     6 import android.app.Activity;
     7 import android.app.AlertDialog;
     8 import android.content.DialogInterface;
     9 import android.location.GpsStatus.Listener;
    10 import android.os.Bundle;
    11 import android.view.View;
    12 import android.view.View.OnClickListener;
    13 import android.widget.Adapter;
    14 import android.widget.AdapterView;
    15 import android.widget.AdapterView.OnItemSelectedListener;
    16 import android.widget.ArrayAdapter;
    17 import android.widget.Button;
    18 import android.widget.CheckBox;
    19 import android.widget.CompoundButton;
    20 import android.widget.CompoundButton.OnCheckedChangeListener;
    21 import android.widget.EditText;
    22 import android.widget.RadioButton;
    23 import android.widget.RadioGroup;
    24 import android.widget.Spinner;
    25 import android.view.Gravity;
    26 import android.view.Menu;
    27 import android.view.MenuItem;
    28 import android.widget.TextView;
    29 import android.widget.Toast;
    30 public class MainActivity extends Activity {
    31 
    32     private TextView textView;
    33     private RadioGroup group;
    34     private RadioButton b1,b2,b3,b4;
    35     private EditText editText;
    36 
    37     public void onCreate(Bundle savedInstanceState) {
    38         super.onCreate(savedInstanceState);
    39         setContentView(R.layout.activity_main);
    40         textView=(TextView)findViewById(R.id.textView2);
    41         editText=(EditText)findViewById(R.id.editText1);
    42         b1=(RadioButton)findViewById(R.id.radio0);
    43         b2=(RadioButton)findViewById(R.id.radio1);
    44         b3=(RadioButton)findViewById(R.id.radio2);
    45         b4=(RadioButton)findViewById(R.id.radio3);
    46         group=(RadioGroup)findViewById(R.id.radioGroup1);
    47         group.setOnCheckedChangeListener(listener);
    48 
    49     }
    50     private RadioGroup.OnCheckedChangeListener listener=
    51             new RadioGroup.OnCheckedChangeListener() {
    52 
    53                 public void onCheckedChanged(RadioGroup group, int checkedId) {
    54                 if (checkedId==R.id.radio0){
    55                     String string=editText.getText().toString();
    56                     textView.setText(string+" 你的血型为 "+b1.getText());
    57                 }
    58                 if (checkedId==R.id.radio1){
    59                     String string=editText.getText().toString();
    60                     textView.setText(string+" 你的血型为 "+b2.getText());
    61                 }
    62                 if (checkedId==R.id.radio2){
    63                     String string=editText.getText().toString();
    64                     textView.setText(string+" 你的血型为 "+b3.getText());
    65                 }
    66                 if (checkedId==R.id.radio3){
    67                     String string=editText.getText().toString();
    68                     textView.setText(string+" 你的血型为 "+b4.getText());
    69                 }
    70                 }
    71             };
    72 
    73 }

    这里写图片描述

  • 相关阅读:
    leetcode 347. Top K Frequent Elements
    581. Shortest Unsorted Continuous Subarray
    leetcode 3. Longest Substring Without Repeating Characters
    leetcode 217. Contains Duplicate、219. Contains Duplicate II、220. Contains Duplicate、287. Find the Duplicate Number 、442. Find All Duplicates in an Array 、448. Find All Numbers Disappeared in an Array
    leetcode 461. Hamming Distance
    leetcode 19. Remove Nth Node From End of List
    leetcode 100. Same Tree、101. Symmetric Tree
    leetcode 171. Excel Sheet Column Number
    leetcode 242. Valid Anagram
    leetcode 326. Power of Three
  • 原文地址:https://www.cnblogs.com/twomeng/p/9476210.html
Copyright © 2011-2022 走看看