消息提示的三种方式

'''''''''''''''''''''''''''1.Toast

效果图：

（1）activity_mian.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.app2.MainActivity"
    android:orientation="vertical">

    <Button
        android:id="@+id/bt1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button" />
    <Button
        android:id="@+id/bt2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button2" />
</LinearLayout>

2.MainAcivity.java

package com.example.app2;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private Button button1,button2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button1=(Button)findViewById(R.id.bt1);
        button2=(Button)findViewById(R.id.bt2);

        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this,"默认Toast..",Toast.LENGTH_SHORT).show();
                Toast.makeText(getApplicationContext(),R.string.toast1,Toast.LENGTH_SHORT).show();
            }
        });

        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast toast = Toast.makeText(MainActivity.this,"自定义Toast..",Toast.LENGTH_SHORT);
                //以中心位置为原点，向右移动200，向下移动200
                toast.setGravity(Gravity.CENTER,200,200);
                toast.show();
            }
        });
    }
}

(3) 使用 

   的时候需要在

写入

<resources>
    <string name="app_name">app2</string>
    <string name="toast1">默认toast111...</string>
</resources>

 2.自定义图片的Toast。

（1）效果图：

（2)MianAcivity.java

 button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast toast = Toast.makeText(MainActivity.this,"自定义图片的Toast...",Toast.LENGTH_SHORT);
                ImageView imageView = new ImageView(MainActivity.this);
                LinearLayout linearLayout =(LinearLayout) toast.getView();
                imageView.setImageResource(R.mipmap.ic_launcher);
                linearLayout.addView(imageView);
                toast.setGravity(Gravity.CENTER,0,0);
                toast.show();

            }
        });

 3.完全自定义的Toast

（1）效果图：

 button4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                LayoutInflater layoutInflater = getLayoutInflater();
                LinearLayout linearLayout =(LinearLayout) layoutInflater.inflate(R.layout.define,null);
                TextView textView = (TextView) linearLayout.findViewById(R.id.tv1);
                textView.setText("这是安全自定义的Toast");

                ImageView imageView = (ImageView)  linearLayout.findViewById(R.id.iv);
                imageView.setImageResource(R.mipmap.ic_launcher);

                TextView textView1 = (TextView)  linearLayout.findViewById(R.id.tv2);
                textView1.setText("www.inspur");

                Toast toast = new Toast(getApplicationContext());
                toast.setView(linearLayout);
                toast.setDuration(Toast.LENGTH_SHORT);
                toast.setGravity(Gravity.CENTER,0,0);
                toast.show();



            }
        });

'''''''''''''''''''''2.AlertDialog

[1]:

(1):效果图

（2）MainActivity.java

package com.example.app3;

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button) findViewById(R.id.bt);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                //1.设置标题
                builder.setTitle("登陆提示");
                //2.调用setIcon()显示图标
                builder.setIcon(R.mipmap.ic_launcher);
                //3.设置对话框内容
                builder.setMessage("是否登陆");

                builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getApplicationContext(),"您点击了确认按钮",Toast.LENGTH_SHORT).show();
                    }
                });

                builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getApplicationContext(),"您点击了取消按钮",Toast.LENGTH_SHORT).show();
                    }
                });
                builder.create().show();
            }
        });
    }
}

[2]:

(1)效果图： 选中之后点击确认，之后就可以显示

（2）MianActivity.java

 button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this)
                        .setTitle("简单列表")
                        .setIcon(R.mipmap.ic_launcher)
                        .setItems(str, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                info=str[which];
                                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                                builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
                                    @Override
                                    public void onClick(DialogInterface dialog, int which) {
                                       textView.setText(info);
                                    }
                                });
                                builder.setNegativeButton("取消",null);
                                builder.create().show();
                            }
                        })

                        .create();
                alertDialog.show();

            }
        });

[3]:

(1)效果图：点击多选按钮，点击确认，实现显示多选的选项

（2）MainActivity.java

声明的变量：

  private Button button,button2,button3;
    private  String[]  str={"java","xml","Android"};
    private String info="";
    private TextView textView;
    private boolean[] isCheck ={false,false,false};
    private List<String> list;

初始化：

  button = (Button) findViewById(R.id.bt);
        button2 = (Button) findViewById(R.id.bt2);
        button3 = (Button) findViewById(R.id.bt3);
        textView = (TextView) findViewById(R.id.tv);
        list = new ArrayList<String>();

主要代码：

 button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                //1.设置标题
                builder.setTitle("多选提示");
                //2.调用setIcon()显示图标
                builder.setIcon(R.mipmap.ic_launcher);
                //3.设置对话框的内容
                builder.setMultiChoiceItems(str, isCheck, new DialogInterface.OnMultiChoiceClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                        if (isChecked){
                            list.add(str[which]);
                        }else{
                            list.remove(str[which]);
                        }
                    }
                });
                builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                       textView.setText(list.toString());
                    }
                });

                builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        textView.setText(list.toString());
                    }
                });
                builder.create().show();
            }
        });


    }

[5]单选效果,图片效果

----------------------------------总的MainActivity.java-------------------------------------

package com.example.app3;

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private Button button,button2,button3,button4,button5;
    private  String[]  str={"java","xml","Android"};
    private String info="";
    private TextView textView;
    private boolean[] isCheck ={false,false,false};
    private List<String> list;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button) findViewById(R.id.bt);
        button2 = (Button) findViewById(R.id.bt2);
        button3 = (Button) findViewById(R.id.bt3);
        button4= (Button) findViewById(R.id.bt4);
        button5 = (Button) findViewById(R.id.bt5);
        textView = (TextView) findViewById(R.id.tv);
        list = new ArrayList<String>();


        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                //1.设置标题
                builder.setTitle("登陆提示");
                //2.调用setIcon()显示图标
                builder.setIcon(R.mipmap.ic_launcher);
                //3.设置对话框内容
                builder.setMessage("是否登陆");

                builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getApplicationContext(),"您点击了确认按钮",Toast.LENGTH_SHORT).show();
                    }
                });

                builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getApplicationContext(),"您点击了取消按钮",Toast.LENGTH_SHORT).show();
                    }
                });
                builder.create().show();
            }
        });


        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this)
                        .setTitle("简单列表")
                        .setIcon(R.mipmap.ic_launcher)
                        .setItems(str, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                info=str[which];
                                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                                builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
                                    @Override
                                    public void onClick(DialogInterface dialog, int which) {
                                       textView.setText(info);
                                    }
                                });
                                builder.setNegativeButton("取消",null);
                                builder.create().show();
                            }
                        })

                        .create();
                alertDialog.show();

            }
        });


        button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                //1.设置标题
                builder.setTitle("多选提示");
                //2.调用setIcon()显示图标
                builder.setIcon(R.mipmap.ic_launcher);
                //3.设置对话框的内容
                builder.setMultiChoiceItems(str, isCheck, new DialogInterface.OnMultiChoiceClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                        if (isChecked){
                            list.add(str[which]);
                        }else{
                            list.remove(str[which]);
                        }
                    }
                });
                builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                       textView.setText(list.toString());
                    }
                });

                builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        textView.setText(list.toString());
                    }
                });
                builder.create().show();
            }
        });


        button4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ImageView imageView = new ImageView(MainActivity.this);
                imageView.setImageResource(R.mipmap.ic_launcher);
                AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this)
                        .setTitle("简单列表")
                        .setIcon(R.mipmap.ic_launcher)
                        .setView(imageView)
                        .setPositiveButton("确认",null)
                        .setNegativeButton("取消",null)
                        .create();
                alertDialog.show();

            }
        });
        button5.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this)
                        .setTitle("单选")
                        .setIcon(R.mipmap.ic_launcher)
                        .setSingleChoiceItems(str, 0, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                info=str[which];
                            }
                        })
                        .setPositiveButton("确认", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                textView.setText(info);
                            }
                        })
                        .setNegativeButton("取消",null)
                        .create();
                alertDialog.show();

            }
        });


    }
}

布局activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.app3.MainActivity"
    android:orientation="vertical">

    <Button
        android:id="@+id/bt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button" />
    <Button
        android:id="@+id/bt2"
        android:text="列表效果"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/bt3"
        android:text="多选效果"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/bt4"
        android:text="图片效果"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/bt5"
        android:text="单选效果"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/tv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

 ........................Notification.............

1.效果图

2.MainActivity.xml

package com.example.administrator.hello6;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.SystemClock;
import android.provider.Settings;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    private Button bt1,bt2;
    private NotificationManager notificationManager;
    Context context;
    private int NOCIFICIATIN_ID=1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        bt1 = (Button) findViewById(R.id.bu1);
        bt2 = (Button) findViewById(R.id.bu2);

        context=this;
        notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

        bt1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(context,AAcitivity.class);
                PendingIntent pendingIntent = PendingIntent.getActivities(context,0,new Intent[]{intent},0);
               Notification notification = new Notification.Builder(context)
                       //设置一系列属性
                       //设置打开通知时，通知自动消失
                       .setAutoCancel(true)
                       //设置图标
                       .setSmallIcon(R.mipmap.ic_launcher)
                       //设置标题
                       .setTicker("有新的消息")
                       //设置通知标题
                       .setContentTitle("放假了")
                       //设置通知内容
                       .setContentText("今天周五，明天休息")
                        //设置默认闪光灯，震动
                       .setDefaults(Notification.DEFAULT_ALL)
                       //设置系统当前时间
                       .setWhen(System.currentTimeMillis())
                        //判断当前通知要启动哪一个Intent对象
                        .setContentIntent(pendingIntent)
                       .build();
                notificationManager.notify(NOCIFICIATIN_ID,notification);


            }
        });

        bt2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                notificationManager.cancel(NOCIFICIATIN_ID);

            }
        });

    }
}

2.Acivity.java

package com.example.administrator.hello6;

import android.app.Activity;
import android.os.Bundle;

/**
 * Created by Administrator on 2018/5/11.
 */
public class AAcitivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.a);
    }
}

3.a.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:text="太棒了"
        android:textSize="40px"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

4.AndroidMainfest.xml:设置权限

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.administrator.hello6">
    <uses-permission android:name="android.permission.FLASHLIGHT"></uses-permission>
    <uses-permission android:name="android.permission.VIBRATE"></uses-permission>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".AAcitivity">

        </activity>
    </application>

</manifest>