【重要组件间的数据传递1】如何将BroadcastReceiver中的数据传递

题目描述

使用broadcastreceiver获得android手机的电池电量，，并把电量显示到activity中。

技术分析

用接口传。定义一个接口 让 Activity实现这个接口，然后接受者调用接口里面的方法把要传递的参数传进去。

效果

布局文件==”fill_parent”android:layout_height=”fill_parent”><TextView=”wrap_content”android:text=”Hello World, MainActivity”/></LinearLayout>清单文件==”1″android:versionName=”1.0″><uses-sdk android:minSdkVersion=”7″/><applicationandroid:label=”@string/app_name”android:icon=”@drawable/ic_launcher”><activityandroid:name=”MainActivity”android:label=”@string/app_name”>==>></manifest>广播接收者子类书写package com.ht.dianliang;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.util.Log;import android.widget.Toast;/** * Created by annuo on 2015/5/16. */{private BRInteraction brInteraction;(Context context, Intent intent) {Bundle bundle = intent.getExtras();//获取当前电量int current = bundle.getInt(“level”);//获取总电量（电池的电池容量）int total = bundle.getInt(“scale”);brInteraction.setText(“当前电量：” + current + “,总电量：” + total);}{(String content);}(BRInteraction brInteraction) {this.brInteraction = brInteraction;}}activity书写package com.ht.dianliang;import android.app.Activity;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.widget.TextView;{private TextView textView;/*** Called when the activity is first created.*/(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);textView = (TextView) findViewById(R.id.text);IntentFilter intentFilter = new IntentFilter();intentFilter.addAction(Intent.ACTION_BATTERY_CHANGED);DianLiangBR dianLiangBR = new DianLiangBR();registerReceiver(dianLiangBR, intentFilter);dianLiangBR.setBRInteractionListener(new DianLiangBR.BRInteraction() {(String content) {if (content != null) {textView.setText(content);}}});}}

有多远，走多远，把足迹连成生命线。