ExternalStorage存放音乐，通过Notification播放音乐，并震动的Demo

首先是AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.ty.externstore_demo1">    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS">    </uses-permission>    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE">    </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=".ImageViewClass">        </activity>    </application></manifest>

MainActivity

package com.ty.externstore_demo1;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.Intent;import android.net.Uri;import android.os.Environment;import android.support.annotation.NonNull;import android.support.v4.app.NotificationCompat;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.Toast;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;public class MainActivity extends AppCompatActivity {    String saved_FilePath;    Button btn_Play;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button btn_Save = (Button) findViewById(R.id.BTN_Save);        btn_Play = (Button) findViewById(R.id.BTN_Play);        CheckBtnEnable(btn_Save);    }    public void SendNotification_Btn(View v)    {        PendingIntent pendingIntent = PendingIntent.getActivity(this, 1, new Intent(this,ImageViewClass.class), PendingIntent.FLAG_UPDATE_CURRENT);        NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);        builder.setContentTitle("播放音乐")                .setTicker("通知来啦")                .setSmallIcon(R.mipmap.ic_launcher)                .setContentText(saved_FilePath)                .setAutoCancel(true)                .setNumber(1)                .setSound(Uri.parse(saved_FilePath))                .setPriority(NotificationCompat.PRIORITY_MAX)                .setContentIntent(pendingIntent);        notificationManager.notify(1, builder.build());    }    public void Show_Btn(View v)    {        File dir = Environment.getExternalStorageDirectory();        String[] list = dir.list();        for(String str:list)        {            Log.i("ListInformation", str);        }    }    public void Save_Btn(View v)    {        saved_FilePath = SaveToExtendStorage(R.raw.shake_sound_male, "myMusic.mp3");    }    private void CheckBtnEnable(Button btn)    {        String stats = Environment.getExternalStorageState();        if(!stats.equals(Environment.MEDIA_MOUNTED))        {            btn.setEnabled(false);            Toast.makeText(this,"SD Card Error, Cannot Save Music", Toast.LENGTH_LONG).show();        }        else        {            Toast.makeText(this,"You Can Save Music", Toast.LENGTH_LONG).show();        }    }    @NonNull    private String SaveToExtendStorage(int resourceID, String name)    {        BufferedInputStream bis = new BufferedInputStream(getResources().openRawResource(resourceID));        int len;        byte[] b = new byte[1024];        File savedPath = new File(Environment.getExternalStorageDirectory(), name);        try {            OutputStream os = new FileOutputStream(savedPath);            while((len = bis.read(b)) != -1)            {                os.write(b,0,len);//第二个参数，代表从源b的第几个偏移量开始读                os.flush();            }            os.close();            bis.close();            btn_Play.setEnabled(true);            Toast.makeText(this,savedPath.getPath()+"Saving Finished", Toast.LENGTH_LONG).show();        } catch (IOException e) {            e.printStackTrace();        }        return savedPath.getPath();    }}

ImageViewClass就是通过PendingIntent启动的Activity

package com.ty.externstore_demo1;import android.os.Bundle;import android.os.Vibrator;import android.support.annotation.Nullable;import android.support.v7.app.AppCompatActivity;/** * Created by IT on 2017/2/9. */public class ImageViewClass extends AppCompatActivity {    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_imageview);        Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);        vibrator.vibrate(new long[]{500,2000,500,3000}, -1);    }}

Main的布局文件

<?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:orientation="vertical"    android:id="@+id/activity_main"    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.ty.externstore_demo1.MainActivity">    <Button        android:id="@+id/BTN_Save"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="Save Music"        android:onClick="Save_Btn"/>    <Button        android:id="@+id/BTN_Show"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="Show Dir"        android:onClick="Show_Btn"/>    <Button        android:id="@+id/BTN_Play"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="Play Music"        android:onClick="SendNotification_Btn"        android:enabled="false"/></LinearLayout>

ImageViewClass的布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical" android:layout_width="match_parent"    android:layout_height="match_parent">    <ImageView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:src="@drawable/b"/></LinearLayout>

好了   这就是一个完整版的demo