android基础：广播BroadCast简单案例

运行效果

 

string.xml

    TestBroadcast
    请输入发送参数
    发送广播    
    Settings

activity_main.xml

　

MainActivity　

package com.mytest.testbroadcast;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
	
	private EditText paramText;
	private TextView resultView;
	private final String ACTION_INTENT_TEST="com.mytest.testbroad.intent";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		paramText = (EditText) this.findViewById(R.id.param_input);
		resultView = (TextView) this.findViewById(R.id.view_result);
	}

	
	/**
	 * 发送广播按钮onclick事件
	 * @param view
	 */
	public void SendBroadCast(View view){
		String param = paramText.getText().toString();

		
		//创建发送intent
		Intent intent = new Intent(this.ACTION_INTENT_TEST);
		//绑定参数
		intent.putExtra("user_input", param);
		//发送广播
		this.sendBroadcast(intent); 
		
		resultView.setText("发送广播成功，参数值为:"+param);
		
		
	}
	
}

　

创建广播接听对象

package com.mytest.testbroadcast;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class MyBroadCastReceiver extends BroadcastReceiver {

	@Override
	public void onReceive(Context context, Intent intent) {
		// TODO Auto-generated method stub
		String user_input = intent.getStringExtra("user_input");
		Toast.makeText(context,"接收到广播，得到参数值为"+user_input,Toast.LENGTH_SHORT).show();
		
	}

}

　　

　AndroidMainfest.xml

　　

案例实现小结：
1、定义ACTION,并建立发送Intent，调用sendBroadcast方法发送广播；
2、创建广播接收类。类要继承BroadcastReceiver，并重写onReceive方法；
3、在AndroidManifest.xml中注册广播接收对象，在intent-filter中添加ACTION。

 

转载于:https://www.cnblogs.com/2015android/p/4660056.html