【学习笔记】自定义广播

向右看齐 2022-08-24 01:54 213阅读 0赞

package com.example.custombroadcast;
    
    import android.os.Bundle;
    import android.app.Activity;
    import android.content.Intent;
    import android.view.Menu;
    import android.view.View;
    import android.widget.EditText;
    
    public class MainActivity extends Activity {
    
    	private EditText et_info;
    	
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		et_info = (EditText) findViewById(R.id.ed_info);
    	}
    
    	@Override
    	public boolean onCreateOptionsMenu(Menu menu) {
    		// Inflate the menu; this adds items to the action bar if it is present.
    		getMenuInflater().inflate(R.menu.main, menu);
    		return true;
    	}
    
    	public void send(View v){
    		String info = et_info.getText().toString();
    		
    		//发送广播
    		Intent intent = new Intent();
    		intent.setAction("cn.com.send");
    		intent.putExtra("info", info);
    		sendBroadcast(intent);//普通广播
    	}
    }

package com.example.custombroadcast;
    
    import android.content.BroadcastReceiver;
    import android.content.Context;
    import android.content.Intent;
    import android.util.Log;
    
    public class MyReceiver extends BroadcastReceiver{
    
    	@Override
    	public void onReceive(Context context, Intent intent) {
    
    		String info = intent.getStringExtra("info");
    		Log.i("i","info:"+info);
    	}
    }

<?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
        package="com.example.custombroadcast"
        android:versionCode="1"
        android:versionName="1.0" >
    
        <uses-sdk
            android:minSdkVersion="8"
            android:targetSdkVersion="17" />
    
        <application
            android:allowBackup="true"
            android:icon="@drawable/ic_launcher"
            android:label="@string/app_name"
            android:theme="@style/AppTheme" >
            <activity
                android:name="com.example.custombroadcast.MainActivity"
                android:label="@string/app_name" >
                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />
    
                    <category android:name="android.intent.category.LAUNCHER" />
                </intent-filter>
            </activity>
            
            <receiver android:name=".MyReceiver">
                <intent-filter >
                    <action android:name="cn.com.send"/>
                </intent-filter>
            </receiver>
        </application>
    
    </manifest>