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package com.developmenttools.customui.activity;

import java.util.HashSet;

import java.util.Set;

import com.developmenttools.listener.HomeClickListener;

import com.yzx.tools.CustomLog;

import android.app.Activity;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.graphics.Color;

import android.hardware.Sensor;

import android.hardware.SensorEvent;

import android.hardware.SensorEventListener;

import android.hardware.SensorManager;

import android.os.Bundle;

import android.view.View;

import android.view.ViewGroup;

import android.view.Window;

import android.view.WindowManager;

/**

* 基类Activity

*

* @data:2012-12-6 下午4:44:23

*/

public class BaseCallActivity extends BaseActivity {

private HomeKeyEventBroadCastReceiver homeKeyEventReceiver;

private HomeClickListener homeCliekListener;

private Set sProximityDependentActivities = new HashSet();

private View activityView;

public synchronized void startProximitySensorForActivity(Activity activity) {

if (!sProximityDependentActivities.contains(activity)) {

activityView = ((ViewGroup) activity.getWindow().getDecorView().findViewById(android.R.id.content)).getChildAt(0);

SensorManager sm = (SensorManager) activity.getSystemService(Context.SENSOR_SERVICE);

Sensor s = sm.getDefaultSensor(Sensor.TYPE_PROXIMITY);

if (s != null) {

sm.registerListener(sProximitySensorListener, s, SensorManager.SENSOR_DELAY_UI);

}

sProximityDependentActivities.add(activity);

}

}

public synchronized void stopProximitySensorForActivity(Activity activity) {

simulateProximitySensorNearby(activity, false);

sProximityDependentActivities.remove(activity);

SensorManager sm = (SensorManager) activity.getSystemService(Context.SENSOR_SERVICE);

sm.unregisterListener(sProximitySensorListener);

}

private SensorEventListener sProximitySensorListener = new SensorEventListener() {

@Override

public void onSensorChanged(SensorEvent event) {

if (event.timestamp == 0){

return;

}

proximityNearbyChanged(isProximitySensorNearby(event));

}

@Override

public void onAccuracyChanged(Sensor sensor, int accuracy) {}

};

public Boolean isProximitySensorNearby(final SensorEvent event) {

float threshold = 4.001f; // <= 4 cm is near

final float distanceInCm = event.values[0];

final float maxDistance = event.sensor.getMaximumRange();

boolean isNear = false;

if (maxDistance >= 1023.0f) {

if (distanceInCm < threshold) {

isNear = true;

}

} else {

if (maxDistance >= 255.0f) {

if (distanceInCm <= 0.0f) {

isNear = true;

}

} else {

if (maxDistance <= threshold) {

threshold = maxDistance;

}

if (distanceInCm < threshold) {

isNear = true;

}

}

}

return isNear;

}

private void proximityNearbyChanged(boolean mLastProximitySensorValueNearby) {

for (Activity activity : sProximityDependentActivities) {

simulateProximitySensorNearby(activity, mLastProximitySensorValueNearby);

}

}

private void simulateProximitySensorNearby(Activity activity, boolean nearby) {

Window window = activity.getWindow();

WindowManager.LayoutParams params = activity.getWindow().getAttributes();

if (nearby) {

params.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;

window.setAttributes(params);

View view = new View(activity);

view.setBackgroundColor(Color.parseColor("#000000"));

window.setContentView(view);

} else {

params.flags &= (~WindowManager.LayoutParams.FLAG_FULLSCREEN);

window.setAttributes(params);

if(activityView != null){

window.setContentView(activityView);

}

}

}

@Override

protected void onCreate(Bundle savedInstanceState) {

IntentFilter ift = new IntentFilter();

ift.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);

homeKeyEventReceiver = new HomeKeyEventBroadCastReceiver();

registerReceiver(homeKeyEventReceiver, ift);

super.onCreate(savedInstanceState);

}

@Override

protected void onStart() {

super.onStart();

startProximitySensorForActivity(this);

}

public void addHomeClickListener(HomeClickListener homeListener){

homeCliekListener = homeListener;

}

public class HomeKeyEventBroadCastReceiver extends BroadcastReceiver {

static final String SYSTEM_REASON = "reason";

static final String SYSTEM_HOME_KEY = "homekey";// home key

static final String SYSTEM_RECENT_APPS = "recentapps";// long home key

@Override

public void onReceive(Context context, Intent intent) {

if (intent.getAction().equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {

String reason = intent.getStringExtra(SYSTEM_REASON);

if (reason != null) {

if (reason.equals(SYSTEM_HOME_KEY) || reason.equals(SYSTEM_RECENT_APPS)) {

if(homeCliekListener != null){

homeCliekListener.onClick();

}

}

}

}

}

};

@Override

protected void onPause() {

super.onPause();

stopProximitySensorForActivity(this);

}

@Override

protected void onRestart() {

super.onRestart();

startProximitySensorForActivity(this);

}

@Override

protected void onDestroy() {

stopProximitySensorForActivity(this);

unregisterReceiver(homeKeyEventReceiver);

super.onDestroy();

}

}

原文：http://www.cnblogs.com/laughingQing/p/4848479.html