Android开发学习之路-抢红包助手开发全攻略

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:id="@+id/root"
    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:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:layout_marginTop="5dp"
    android:orientation="vertical"
    tools:context="com.fndroid.administrator.justforyou.MainActivity">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="3"
            android:text="打开提示音"/>

        <CheckBox
            android:id="@+id/isMusic"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="音量调节"/>

        <SeekBar
            android:id="@+id/seekbar"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_weight="1"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="3"
            android:text="有红包亮屏并解锁"/>

        <CheckBox
            android:id="@+id/isUnlock"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
    </LinearLayout>

    <Button
        android:id="@+id/setPermision"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="设置通知权限"/>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="声明："/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="本软件为个人开发所得，只能对微信红包进行提醒。请合理使用本软件，使用不当造成的各种行为均与本人无关。软件使用过程不联网，不存在任何盗窃用户信息行为，请放心使用。"/>


            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="使用方法："/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="①如果未赋予软件读取通知权限，点击按钮“设置通知权限"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="②在本软件右侧勾选上，并确认提示信息"/>

            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:scaleType="fitCenter"
                android:src="@drawable/inf"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="③关闭微信群的消息免打扰（取消图中的绿色按钮）"/>

            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:src="@drawable/inf2"/>
        </LinearLayout>
    </ScrollView>
</LinearLayout>

// 编写一个NotificationListenerService的子类并实现onNotificationPosted和onNotificationRemoved方法
// 这两个方法在从SDK版本21的时候开始变成了非抽象，不重写则不能兼容21以下设备
public class NotificationService extends NotificationListenerService {

    private KeyguardManager.KeyguardLock kl;

    @Override
    public void onNotificationPosted(StatusBarNotification sbn) {
        // 主界面设置的信息保存在SharedPreferences中，在这里进行获取
        SharedPreferences sharedPreferences = getSharedPreferences("userdata", MODE_PRIVATE);

        // 判断消息是否为微信红包
        if (sbn.getNotification().tickerText.toString().contains("[微信红包]") && sbn.getPackageName
                ().equals("com.tencent.mm")) {

            // 读取设置信息，判断是否该点亮屏幕并解开锁屏，解锁的原理是把锁屏关闭掉
            if (sharedPreferences.getBoolean("isUnlock",true)) {
                KeyguardManager km = (KeyguardManager) getSystemService(getApplicationContext()
                        .KEYGUARD_SERVICE);
                kl = km.newKeyguardLock("unlock");

                // 把系统锁屏暂时关闭
                kl.disableKeyguard();
                PowerManager pm = (PowerManager) getSystemService(getApplicationContext()
                        .POWER_SERVICE);
                PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP |
                        PowerManager.SCREEN_DIM_WAKE_LOCK, "bright");
                wl.acquire();
                wl.release();
            }

            try {
                // 打开notification所对应的pendingintent
                sbn.getNotification().contentIntent.send();

            } catch (PendingIntent.CanceledException e) {
                e.printStackTrace();
            }

            // 判断是否该播放提示音
            if (sharedPreferences.getBoolean("isMusic",true)){
                MediaPlayer mediaPlayer = new MediaPlayer().create(this, R.raw.heihei);
                mediaPlayer.start();
            }

            // 这里监听一下系统广播，判断如果屏幕熄灭就把系统锁屏还原
            IntentFilter intentFilter = new IntentFilter();
            intentFilter.addAction("android.intent.action.SCREEN_OFF");
            ScreenOffReceiver screenOffReceiver = new ScreenOffReceiver();
            registerReceiver(screenOffReceiver, intentFilter);

        }

    }

    class ScreenOffReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (kl != null) {
                // 还原锁屏
                kl.reenableKeyguard();
            }
        }
    }

    @Override
    public void onNotificationRemoved(StatusBarNotification sbn) {
        super.onNotificationRemoved(sbn);
    }
}

public class MainActivity extends AppCompatActivity implements CompoundButton
        .OnCheckedChangeListener, View.OnClickListener,SeekBar.OnSeekBarChangeListener {

    private LinearLayout root;
    private CheckBox isMusic;
    private CheckBox isUnlock;
    private SharedPreferences.Editor editor;
    private SharedPreferences sharedPreferences;
    private Button setPermision;
    private SeekBar seekBar;
    private AudioManager audioManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 获取控件实例
        root = (LinearLayout) findViewById(R.id.root);
        isMusic = (CheckBox) findViewById(R.id.isMusic);
        isUnlock = (CheckBox) findViewById(R.id.isUnlock);
        setPermision = (Button) findViewById(R.id.setPermision);
        seekBar = (SeekBar) findViewById(R.id.seekbar);

        // 注册监听
        isMusic.setOnCheckedChangeListener(this);
        isUnlock.setOnCheckedChangeListener(this);
        setPermision.setOnClickListener(this);
        seekBar.setOnSeekBarChangeListener(this);

        // 读取设置信息
        sharedPreferences = getSharedPreferences("userdata", MODE_PRIVATE);
        editor = sharedPreferences.edit();
        boolean music = sharedPreferences.getBoolean("isMusic", true);
        boolean unlock = sharedPreferences.getBoolean("isUnlock", true);
        isMusic.setChecked(music);
        isUnlock.setChecked(unlock);

        // 获得Audiomanager，控制系统音量
        audioManager = (AudioManager) getSystemService(this.AUDIO_SERVICE);
        seekBar.setMax(audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC));
        seekBar.setProgress(audioManager.getStreamVolume(AudioManager.STREAM_MUSIC));

        // 监听系统媒体音量改变，并改变界面上的Seekbar的进度
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("android.media.VOLUME_CHANGED_ACTION");
        VolumReceiver receiver = new VolumReceiver();
        registerReceiver(receiver,intentFilter);

        // 开启服务
        Intent intent = new Intent(MainActivity.this, NotificationService.class);
        startService(intent);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // 判断返回键点击，提示用户是否确认退出
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
            Snackbar snackbar = Snackbar.make(root, "退出软件", Snackbar.LENGTH_LONG)
                    .setAction("确认", new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            MainActivity.this.finish();
                        }
                    });
            snackbar.show();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        // checkbox的点击监听
        switch (buttonView.getId()) {
            case R.id.isMusic:
                editor.putBoolean("isMusic", isChecked);
                editor.commit();
                break;
            case R.id.isUnlock:
                editor.putBoolean("isUnlock", isChecked);
                editor.commit();
                break;
        }

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.setPermision:
                // 打开系统里面的服务，方便用户直接赋予权限
                Intent intent = new Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS);
                startActivity(intent);
                break;
        }

    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        // seekbar的监听，滑动停止就修改系统媒体音量
        audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,seekBar.getProgress(),0);
    }

    // 音量广播接收
    class VolumReceiver extends BroadcastReceiver{
        @Override
        public void onReceive(Context context, Intent intent) {
            seekBar.setProgress(audioManager.getStreamVolume(AudioManager.STREAM_MUSIC));
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest package="com.fndroid.administrator.justforyou"
          xmlns:android="http://schemas.android.com/apk/res/android">

    <uses-permission android:name="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE"/>
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.DISABLE_KEYGUARD" />

    <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>
        <service android:name=".NotificationService"
                 android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
            <intent-filter>
                <action android:name="android.service.notification.NotificationListenerService" />
            </intent-filter>
        </service>
    </application>

</manifest>

dependencies {
    compile fileTree(dir: ‘libs‘, include: [‘*.jar‘])
    testCompile ‘junit:junit:4.12‘
    compile ‘com.android.support:appcompat-v7:23.1.1‘
    compile ‘com.android.support:design:23.1.1‘
}