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  • 正确代码 = =

    1.Testactivity1.java

      1 package com.hanqi.myapplication;
      2 
      3 import android.app.Activity;
      4 import android.content.Intent;
      5 import android.os.Bundle;
      6 import android.util.Log;
      7 import android.view.View;
      8 import android.widget.EditText;
      9 import android.widget.Toast;
     10 
     11 //1.继承Activity
     12 /**
     13  * Created by lenovo on 2016/4/22.
     14  */
     15 public class TestActivity1 extends Activity {
     16 
     17     //成员变量
     18     EditText et1;
     19     EditText et2;
     20     EditText et3;
     21     //2.重写onCreate(),关联Layout文件
     22     //onCreate()是一个回调方法:在满足特定条件下自动调用的方法;方法名一般on开头
     23 
     24     @Override
     25     protected void onCreate(Bundle savedInstanceState) {
     26         super.onCreate(savedInstanceState);
     27 
     28         //关联
     29         setContentView(R.layout.message_relativelayout);
     30         //初始化工作
     31         //获取Layout文件中定义的组件
     32 
     33         et1=(EditText)findViewById(R.id.et1);
     34         et2=(EditText)findViewById(R.id.et2);
     35         et3=(EditText)findViewById(R.id.et3);
     36         Log.e("TAG","onCreat()被调用");
     37 
     38         //得到意图
     39         Intent intent = getIntent();
     40         String strname = intent.getStringExtra("name");
     41         String strname1 = intent.getStringExtra("name1");
     42         //intent.getExtras();
     43         Log.e("TAG","意图传递的数据="+strname);
     44         Log.e("TAG","意图传递的数据1="+strname1);
     45 //        if(savedInstanceState!=null&&!savedInstanceState.isEmpty())
     46 //        {
     47 //        et1.setText(savedInstanceState.getString("et1")+"恢复之后的");
     48 //        et2.setText(savedInstanceState.getString("et2"));
     49 //        et3.setText(savedInstanceState.getString("et3"));
     50 //        }
     51     }
     52 
     53     //保存状态
     54     @Override
     55     protected void onSaveInstanceState(Bundle outState) {
     56         super.onSaveInstanceState(outState);
     57         Log.e("TAG", "保存应用状态");
     58 
     59         outState.putString("et1", et1.getText().toString());
     60         outState.putString("et1",et2.getText().toString());
     61         outState.putString("et1",et3.getText().toString());
     62     }
     63 
     64     //恢复状态
     65     @Override
     66     protected void onRestoreInstanceState(Bundle savedInstanceState) {
     67         super.onRestoreInstanceState(savedInstanceState);
     68         Log.e("TAG", "恢复应用状态");
     69 
     70         et1.setText(savedInstanceState.getString("et1"));
     71         et2.setText(savedInstanceState.getString("et2"));
     72         et3.setText(savedInstanceState.getString("et3"));
     73 
     74     }
     75 
     76     //启动
     77     @Override
     78     protected void onStart() {
     79         super.onStart();
     80         Log.e("TAG","onStart()被调用");
     81     }
     82     //重启
     83     @Override
     84     protected void onRestart() {
     85         super.onRestart();
     86         Log.e("TAG", "onRestart()被调用");
     87     }
     88     //继续
     89     @Override
     90     protected void onResume() {
     91         super.onResume();
     92         Log.e("TAG", "onResume()被调用");
     93     }
     94     //暂停
     95     @Override
     96     protected void onPause() {
     97         super.onPause();
     98         Log.e("TAG", "onPause()被调用");
     99     }
    100     //停止
    101     @Override
    102     protected void onStop() {
    103         super.onStop();
    104         Log.e("TAG", "onStop()被调用");
    105     }
    106     //销毁
    107     @Override
    108     protected void onDestroy() {
    109         super.onDestroy();
    110         Log.e("TAG", "onDestroy()被调用");
    111     }
    112     //点击事件方法
    113     public void bt_OnClick(View v)
    114     {
    115         //显示提示信息
    116         //方法链
    117         Toast.makeText(TestActivity1.this, "消息发送成功", Toast.LENGTH_SHORT).show();
    118     }
    119     public void close_OnClick(View v)
    120     {
    121         //关闭应用
    122         finish();
    123     }
    124 }

    2.MainActivity.java

     1 package com.hanqi.myapplication;
     2 
     3 import android.content.ComponentName;
     4 import android.content.Intent;
     5 import android.net.Uri;
     6 import android.os.Bundle;
     7 import android.support.v7.app.AppCompatActivity;
     8 import android.util.Log;
     9 import android.view.View;
    10 import android.widget.Button;
    11 
    12 public class MainActivity extends AppCompatActivity {
    13 
    14     //回调方法 (on开头的方法都是)
    15     //在创建时自动调用
    16     @Override
    17     protected void onCreate(Bundle savedInstanceState) {
    18         //调用父类的回调方法
    19         super.onCreate(savedInstanceState);
    20         //设置内容视图文件
    21         //建立Activity和Layout文件之间的关联
    22         setContentView(R.layout.test_linearlayout);
    23         //1.获得这个组件
    24         Button bt2 =  (Button)findViewById(R.id.button2);
    25         //2.操作这个组件
    26         // bt2.setText("新按钮");
    27         //日志输出
    28         System.out.print("日志输出=应用开始运行");
    29         Log.v("HANQI", "Verbose级别的日志信息");
    30         Log.d("HANQI", "Debug级别的日志信息");
    31         Log.i("HANQI", "Info级别的日志信息");
    32         Log.w("HANQI", "Warning级别的日志信息");
    33         Log.e("HANQI", "Error级别的日志信息");
    34     }
    35     public void login_onClick(View v)
    36     {
    37         //打开新的Activity
    38         //1.创建意图  显式意图
    39         Intent intent = new Intent();
    40         //定义显式意图
    41         ComponentName componentName = new ComponentName(this,TestActivity1.class);
    42         intent.setComponent(componentName);
    43         intent.putExtra("name", "意图传递的值");
    44         intent.putExtra("name1", "意图传递的值1");
    45 
    46         //2.发起意图
    47         startActivity(intent);
    48     }
    49     public void bt2_onClick(View v)
    50     {
    51         //发起隐式意图
    52         //打开拨打电话的界面
    53         //系统已经预先定义了常用功能的Action的字符串常量
    54         Intent intent2 = new Intent(Intent.ACTION_CALL);
    55         //intent2.setAction(Intent.ACTION_DIAL);
    56 
    57         //构造Uri
    58         Uri uri = Uri.parse("tel:110");
    59 
    60         //intent2.addCategory("");
    61 
    62         //设置data
    63         intent2.setData(uri);
    64 
    65         //intent2.setType("");
    66         //intent2.setDataAndType(uri,"");
    67 
    68         try
    69         {
    70             startActivity(intent2);
    71         }
    72         catch (Exception e){
    73             e.printStackTrace();
    74         }
    75     }
    76 
    77     public void bt3_onClick(View v)
    78     {
    79         //返回桌面
    80         Intent intent3 = new Intent(Intent.ACTION_MAIN);
    81 
    82         intent3.addCategory(Intent.CATEGORY_HOME);
    83 
    84         startActivity(intent3);
    85     }
    86     public void bt4_onClick(View v)
    87     {
    88         //定义隐式意图
    89         Intent intent4 = new Intent("com.hanqi.action.test1");
    90         //如果不主动添加Category,默认给Category加上"android.intent.category.DEFAULT"
    91         //主动添加Category
    92         intent4.addCategory("com.hanqi.category.test1");
    93         startActivity(intent4);
    94     }
    95 }

    3.Android Mani fest.xml

     1 package com.hanqi.myapplication;
     2 
     3 import android.content.ComponentName;
     4 import android.content.Intent;
     5 import android.net.Uri;
     6 import android.os.Bundle;
     7 import android.support.v7.app.AppCompatActivity;
     8 import android.util.Log;
     9 import android.view.View;
    10 import android.widget.Button;
    11 
    12 public class MainActivity extends AppCompatActivity {
    13 
    14     //回调方法 (on开头的方法都是)
    15     //在创建时自动调用
    16     @Override
    17     protected void onCreate(Bundle savedInstanceState) {
    18         //调用父类的回调方法
    19         super.onCreate(savedInstanceState);
    20         //设置内容视图文件
    21         //建立Activity和Layout文件之间的关联
    22         setContentView(R.layout.test_linearlayout);
    23         //1.获得这个组件
    24         Button bt2 =  (Button)findViewById(R.id.button2);
    25         //2.操作这个组件
    26         // bt2.setText("新按钮");
    27         //日志输出
    28         System.out.print("日志输出=应用开始运行");
    29         Log.v("HANQI", "Verbose级别的日志信息");
    30         Log.d("HANQI", "Debug级别的日志信息");
    31         Log.i("HANQI", "Info级别的日志信息");
    32         Log.w("HANQI", "Warning级别的日志信息");
    33         Log.e("HANQI", "Error级别的日志信息");
    34     }
    35     public void login_onClick(View v)
    36     {
    37         //打开新的Activity
    38         //1.创建意图  显式意图
    39         Intent intent = new Intent();
    40         //定义显式意图
    41         ComponentName componentName = new ComponentName(this,TestActivity1.class);
    42         intent.setComponent(componentName);
    43         intent.putExtra("name", "意图传递的值");
    44         intent.putExtra("name1", "意图传递的值1");
    45 
    46         //2.发起意图
    47         startActivity(intent);
    48     }
    49     public void bt2_onClick(View v)
    50     {
    51         //发起隐式意图
    52         //打开拨打电话的界面
    53         //系统已经预先定义了常用功能的Action的字符串常量
    54         Intent intent2 = new Intent(Intent.ACTION_CALL);
    55         //intent2.setAction(Intent.ACTION_DIAL);
    56 
    57         //构造Uri
    58         Uri uri = Uri.parse("tel:110");
    59 
    60         //intent2.addCategory("");
    61 
    62         //设置data
    63         intent2.setData(uri);
    64 
    65         //intent2.setType("");
    66         //intent2.setDataAndType(uri,"");
    67 
    68         try
    69         {
    70             startActivity(intent2);
    71         }
    72         catch (Exception e){
    73             e.printStackTrace();
    74         }
    75     }
    76 
    77     public void bt3_onClick(View v)
    78     {
    79         //返回桌面
    80         Intent intent3 = new Intent(Intent.ACTION_MAIN);
    81 
    82         intent3.addCategory(Intent.CATEGORY_HOME);
    83 
    84         startActivity(intent3);
    85     }
    86     public void bt4_onClick(View v)
    87     {
    88         //定义隐式意图
    89         Intent intent4 = new Intent("com.hanqi.action.test1");
    90         //如果不主动添加Category,默认给Category加上"android.intent.category.DEFAULT"
    91         //主动添加Category
    92         intent4.addCategory("com.hanqi.category.test1");
    93         startActivity(intent4);
    94     }
    95 }

    4.Test linearlayout.xml

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     3     android:orientation="vertical"
     4     android:layout_width="match_parent"
     5     android:layout_height="match_parent"
     6     android:padding="10dp">
     7 
     8     <LinearLayout
     9         android:layout_width="match_parent"
    10         android:layout_height="wrap_content">
    11         <TextView
    12             android:layout_width="wrap_content"
    13             android:layout_height="wrap_content"
    14             android:text="用户名:"/>
    15         <EditText
    16             android:layout_width="match_parent"
    17             android:layout_height="wrap_content"
    18             android:hint="请输入用户名"/>
    19     </LinearLayout>
    20     <LinearLayout
    21         android:layout_width="match_parent"
    22         android:layout_height="wrap_content">
    23         <TextView
    24             android:layout_width="wrap_content"
    25             android:layout_height="wrap_content"
    26             android:text="密码:"/>
    27         <EditText
    28             android:layout_width="match_parent"
    29             android:layout_height="wrap_content"
    30             android:hint="请输入密码"
    31             android:inputType="textPassword"
    32             android:maxLength="6"/>
    33     </LinearLayout>
    34 
    35     <LinearLayout
    36         android:layout_width="match_parent"
    37         android:layout_height="wrap_content">
    38         <Button
    39             android:layout_width="0dp"
    40             android:layout_height="wrap_content"
    41             android:text="显式意图"
    42             android:id="@+id/button"
    43             android:layout_weight="1"
    44             android:onClick="login_onClick"/>
    45 
    46         <Button
    47             android:layout_width="0dp"
    48             android:layout_height="wrap_content"
    49             android:text="隐式意图"
    50             android:id="@+id/button3"
    51             android:layout_weight="1"
    52             android:onClick="bt2_onClick"/>
    53         <Button
    54             android:layout_width="0dp"
    55             android:layout_height="wrap_content"
    56             android:text="返回桌面"
    57             android:id="@+id/button4"
    58             android:layout_weight="1"
    59             android:onClick="bt3_onClick"/>
    60 
    61         <Button
    62             android:layout_width="wrap_content"
    63             android:layout_height="wrap_content"
    64             android:text="New Button"
    65             android:id="@+id/button2"
    66             android:layout_gravity="center"
    67             android:textSize="20sp"
    68             android:textColor="@color/colorPrimary"
    69             android:visibility="gone"/>
    70     </LinearLayout>
    71     <Button
    72         android:layout_width="match_parent"
    73         android:layout_height="wrap_content"
    74         android:text="隐式意图打开Activity"
    75         android:onClick="bt4_onClick"/>
    76 </LinearLayout>

    5.TestAcivity2.java

      1 package com.hanqi.myapplication;
      2 
      3 import android.app.Activity;
      4 import android.content.Intent;
      5 import android.os.Bundle;
      6 import android.util.Log;
      7 import android.view.View;
      8 import android.widget.EditText;
      9 import android.widget.Toast;
     10 
     11 //1.继承Activity
     12 
     13 /**
     14  * Created by lenovo on 2016/4/22.
     15  */
     16 public class TestActivity2 extends Activity{
     17 
     18     //成员变量
     19     EditText et1;
     20     EditText et2;
     21     EditText et3;
     22     //2.重写onCreate(),关联Layout文件
     23     //onCreate()是一个回调方法:在满足特定条件下自动调用的方法;方法名一般on开头
     24 
     25     @Override
     26     protected void onCreate(Bundle savedInstanceState) {
     27         super.onCreate(savedInstanceState);
     28 
     29         //关联
     30         setContentView(R.layout.message_relativelayout);
     31         //初始化工作
     32         //获取Layout文件中定义的组件
     33 
     34         et1=(EditText)findViewById(R.id.et1);
     35         et2=(EditText)findViewById(R.id.et2);
     36         et3=(EditText)findViewById(R.id.et3);
     37         Log.e("TAG","onCreat()被调用");
     38 
     39         //得到意图
     40         Intent intent = getIntent();
     41         String strname = intent.getStringExtra("name");
     42         String strname1 = intent.getStringExtra("name1");
     43         //intent.getExtras();
     44         Log.e("TAG","意图传递的数据="+strname);
     45         Log.e("TAG","意图传递的数据1="+strname1);
     46 //        if(savedInstanceState!=null&&!savedInstanceState.isEmpty())
     47 //        {
     48 //        et1.setText(savedInstanceState.getString("et1")+"恢复之后的");
     49 //        et2.setText(savedInstanceState.getString("et2"));
     50 //        et3.setText(savedInstanceState.getString("et3"));
     51 //        }
     52     }
     53 
     54     //保存状态
     55     @Override
     56     protected void onSaveInstanceState(Bundle outState) {
     57         super.onSaveInstanceState(outState);
     58         Log.e("TAG", "保存应用状态");
     59 
     60         outState.putString("et1", et1.getText().toString());
     61         outState.putString("et1",et2.getText().toString());
     62         outState.putString("et1",et3.getText().toString());
     63     }
     64 
     65     //恢复状态
     66     @Override
     67     protected void onRestoreInstanceState(Bundle savedInstanceState) {
     68         super.onRestoreInstanceState(savedInstanceState);
     69         Log.e("TAG", "恢复应用状态");
     70 
     71         et1.setText(savedInstanceState.getString("et1")+"恢复之后的");
     72         et2.setText(savedInstanceState.getString("et2"));
     73         et3.setText(savedInstanceState.getString("et3"));
     74 
     75     }
     76 
     77     //启动
     78     @Override
     79     protected void onStart() {
     80         super.onStart();
     81         Log.e("TAG","onStart()被调用");
     82     }
     83     //重启
     84     @Override
     85     protected void onRestart() {
     86         super.onRestart();
     87         Log.e("TAG", "onRestart()被调用");
     88     }
     89     //继续
     90     @Override
     91     protected void onResume() {
     92         super.onResume();
     93         Log.e("TAG", "onResume()被调用");
     94     }
     95     //暂停
     96     @Override
     97     protected void onPause() {
     98         super.onPause();
     99         Log.e("TAG", "onPause()被调用");
    100     }
    101     //停止
    102     @Override
    103     protected void onStop() {
    104         super.onStop();
    105         Log.e("TAG", "onStop()被调用");
    106     }
    107     //销毁
    108     @Override
    109     protected void onDestroy() {
    110         super.onDestroy();
    111         Log.e("TAG", "onDestroy()被调用");
    112     }
    113     //点击事件方法
    114     public void bt_OnClick(View v)
    115     {
    116         //显示提示信息
    117         //方法链
    118         Toast.makeText(TestActivity2.this, "消息发送成功", Toast.LENGTH_SHORT).show();
    119     }
    120     public void close_OnClick(View v)
    121     {
    122         //关闭应用
    123         finish();
    124     }
    125 }
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  • 原文地址:https://www.cnblogs.com/TENOKAWA/p/5434797.html
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