Service生命周期和启动方式

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.a34zuoye">
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <receiver
            android:name=".MyReceiver2"
            android:enabled="true"
            android:exported="true">
            <intent-filter android:priority="1000">
                <action android:name="com.feng.broad"></action>
            </intent-filter>
        </receiver>
        <receiver
            android:name=".MyReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="com.feng.broad"></action>
            </intent-filter>
        </receiver>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>





<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/updata_ui_id"
        android:text="更新一个图片"
        />

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/image_id"
        android:src="@mipmap/ic_launcher"
        />

</LinearLayout>






public class Main2Activity extends AppCompatActivity {
    
    
    private Button updataUiId;
    private ImageView imageId;
    private com.example.day013.MyReceiver2 myReceiver2;

    private Handler handler = new Handler(){
    
    
        @Override
        public void handleMessage(Message msg) {
    
    
            super.handleMessage(msg);

        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        updataUiId = findViewById(R.id.updata_ui_id);
        imageId = findViewById(R.id.image_id);

        myReceiver2  = new com.example.day013.MyReceiver2(handler,imageId);

        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("com.feng.ui");
        registerReceiver(myReceiver2,intentFilter);

        updataUiId.setOnClickListener(new View.OnClickListener() {
    
    
            @Override
            public void onClick(View v) {
    
    
                Intent intent = new Intent();
                intent.setAction("com.feng.ui");
                sendBroadcast(intent);
            }
        });
    }
    @Override
    protected void onDestroy() {
    
    
        super.onDestroy();
        unregisterReceiver(myReceiver2);
    }
}





public class MyReceiver2 extends BroadcastReceiver {
    
    

    private Handler handler;
    private ImageView imageView;

    public MyReceiver2(Handler handler, ImageView imageView) {
    
    
        super();
        this.handler = handler;
        this.imageView = imageView;
    }

    @Override
    public void onReceive(Context context, Intent intent) {
    
    
        String action = intent.getAction();
        if ("com.feng.ui".equals(action)){
    
    
            handler.post(new Runnable() {
    
    
                @Override
                public void run() {
    
    
                    imageView.setImageResource(R.mipmap.ic_launcher_round);
                }
            });
        }
    }
}