第6天（广播接收BroadcastReceiver）

1.打电话广播接收者（需要在清单文件注册，同时要配置权限）

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

public class CallPhoneBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "开始执行监听打电话。。。。。。", Toast.LENGTH_SHORT).show();
    }

}

2.特殊广播（操作频繁，需要手动注册，清单文件不用配置）

import android.app.Activity;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;

public class MainActivity extends Activity {

    private ScreenStateBroadcastReceiver receiver;

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

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(receiver);
    }

    // 注册锁屏和解锁的广播事件
    public void registBroadcast(View view) {
        receiver = new ScreenStateBroadcastReceiver();
        IntentFilter filter = new IntentFilter();
        // 添加action
        filter.addAction("android.intent.action.SCREEN_OFF");
        filter.addAction("android.intent.action.SCREEN_ON");

        // 手动注册广播
        registerReceiver(receiver, filter);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

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

public class ScreenStateBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        // 获取action
        String action = intent.getAction();

        // 对于解锁和锁屏这种用的比较频繁action，谷歌做了限制，必须手动用代码注册。
        if ("android.intent.action.SCREEN_OFF".equals(action)) {
            System.out.println("锁屏中。。。。。。。。。。。。。");
        } else if ("android.intent.action.SCREEN_ON".equals(action)) {
            System.out.println("。。。。。。。。。。。。。解锁屏幕");
        }

    }

}

3.系统常用的弹出框(普通对话框、条目对话框、单选对话框、多选对话框、自定义对话框、水平进度条对话框)

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import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;

public class MainActivity extends Activity {

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

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
    }

    // 普通对话框
    public void click1(View view) {
        ShowPopWin.alert(this, "开始执行监听111");
    }

    // 条目对话框
    public void click2(View view) {
        final String[] items = new String[] { "语文", "数学", "英语", "历史" };

        ShowPopWin.alert(this, items);
    }

    // 单选对话框
    public void click3(View view) {
        final String[] items = new String[] { "语文", "数学", "英语", "历史" };

        ShowPopWin.alertSingileChoice(this, items);
    }

    // 多选对话框
    public void click4(View view) {
        final String[] items = new String[] { "语文", "数学", "英语", "历史" };
        final boolean[] checkedItems = new boolean[] { false, false, false, false };

        ShowPopWin.alertMuitiChoice(this, items, checkedItems);
    }

    // 自定义对话框
    public void click5(View view) {
        View defineView = getLayoutInflater().inflate(R.layout.dialogdefinelayout, null);
        ShowPopWin.alertUserDefine(this, defineView);
    }

    // 圆形进度条对话框
    public void click6(View view) {
        ShowPopWin.ciyleProgressdialog(this);
    }

    // 水平进度条对话框
    public void click7(View view) {
        ShowPopWin.horizontalProgressdialog(this);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="registBroadcast"
        android:text="注册广播哦" />
    
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="click1"
        android:text="普通对话框" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="click2"
        android:text="列表对话框" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="click3"
        android:text="单选对话框" />
    
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="click4"
        android:text="多选对话框" />
    
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="click5"
        android:text="自定义对话框" />
    
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="click6"
        android:text="圆形进度条" />
    
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="click7"
        android:text="水平进度条" />

</LinearLayout>

清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.broadcastreceiver"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <!-- 打电话权限 -->
    <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.broadcastreceiver.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="com.example.broadcastreceiver.CallPhoneBroadcastReceiver" >
            <intent-filter>
               	<!-- 主动打电话时,发送的广播 -->
        		<action android:name="android.intent.action.NEW_OUTGOING_CALL"/>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </receiver>
    </application>

</manifest>