【Android】23.BroadcastReceiver的优先级

23.BroadcastReceiver的优先级

1.下载素材。

本节素材源码，请在公众号回复" AS12143 "。

2.修改AndroidManifest。

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

    <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="10">
                <action android:name="jsz.nopi.firstapp.intent.action.MyReceiver" />
            </intent-filter>
        </receiver>
        <receiver
            android:name=".MyReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter android:priority="9">
                <action android:name="jsz.nopi.firstapp.intent.action.MyReceiver" />
            </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>

3.修改MainActivity。

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private EditText editText;
    private Button button;

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

        editText = findViewById(R.id.editText);
        button = findViewById(R.id.button);

        button.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.button:
                Intent intent = new Intent("jsz.nopi.firstapp.intent.action.MyReceiver");
                intent.putExtra("msg", editText.getText().toString());
                sendBroadcast(intent);
                break;
        }
    }
}

4.修改MyRecevier。

public class MyReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        System.out.println("MyReceiver接收到了信息是："+intent.getStringExtra("msg"));
    }
}

5.修改MyRecevier2。

public class MyReceiver2 extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        System.out.println("MyReceiver2接收到了信息是："+intent.getStringExtra("msg"));
    }
}

6.效果图。