android 4.0 屏蔽home键实现
2014-03-17 15:17
302 查看
开启copy模式:
最近研究锁屏,按照常规的方法,常规方法如下
Java代码
public void onAttachedToWindow()
{
this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
super.onAttachedToWindow();
}
但是这个方法到了4.0的系统上就失效了,按home照样会返回桌面。apktool了几个锁屏的软件之后发现其实现方法,即用WindowManager的addview方法将view加到窗口上,加上的时候将view的layoutparamas的type设为LayoutParams.TYPE_SYSTEM_ERROR,这个值sdk的解释为
Java代码
public static final int TYPE_SYSTEM_ERROR
Since: API Level 1
Window type: internal system error windows, appear on top of everything they can.
如果直接这样用会报错,还要在AndroidManifest.xml里面加上权限<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>,ok上完整代码,封装了一个类,其中Lock和hide方法实现锁屏和解锁。
Java代码
public class LockLayer {
private Activity mActivty;
private WindowManager mWindowManager;
private View mLockView;
private LayoutParams mLockViewLayoutParams;
public LockLayer(Activity act) {
mActivty = act;
init();
}
private void init(){
mWindowManager = mActivty.getWindowManager();
mLockViewLayoutParams = new LayoutParams();
mLockViewLayoutParams.width = LayoutParams.MATCH_PARENT;
mLockViewLayoutParams.height = LayoutParams.MATCH_PARENT;
//实现关键
mLockViewLayoutParams.type = LayoutParams.TYPE_SYSTEM_ERROR;
//apktool value,这个值具体是哪个变量还请网友帮忙
mLockViewLayoutParams.flags = 1280;
}
public void lock() {
if(mLockView!=null){
mWindowManager.addView(mLockView, mLockViewLayoutParams);
}
}
public void unlock() {
if(mWindowManager!=null){
mWindowManager.removeView(mLockView);
}
}
public void setLockView(View v){
mLockView = v;
}
}
使用方法如下
Java代码
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View lock = View.inflate(this, R.layout.main, null);
LockLayer lockLayer = new LockLayer(this);
lockLayer.setLockView(lock);
lockLayer.lock();
}
ok,这时可以实现按home键不返回桌面的效果,其他的键需要用另外的代码实现,网上都有。这段代码只调用一次的时候没有问题,但是如果遇到多线程或者多次lock和hide就会有问题,修改如下,一是将LockLayer改为单例模式,二是在hide和lock的时候先判断状态。修改后代码如下
Java代码
public class LockLayer {
private Activity mActivty;
private WindowManager mWindowManager;
private View mLockView;
private LayoutParams mLockViewLayoutParams;
private static LockLayer mLockLayer;
private boolean isLocked;
public static synchronized LockLayer getInstance(Activity act){
if(mLockLayer == null){
mLockLayer = new LockLayer(act);
}
return mLockLayer;
}
private LockLayer(Activity act) {
mActivty = act;
init();
}
private void init(){
isLocked = false;
mWindowManager = mActivty.getWindowManager();
mLockViewLayoutParams = new LayoutParams();
mLockViewLayoutParams.width = LayoutParams.MATCH_PARENT;
mLockViewLayoutParams.height = LayoutParams.MATCH_PARENT;
//实现关键
mLockViewLayoutParams.type = LayoutParams.TYPE_SYSTEM_ERROR;
//apktool value,这个值具体是哪个变量还请网友帮忙
mLockViewLayoutParams.flags = 1280;
}
public synchronized void lock() {
if(mLockView!=null&&!isLocked){
mWindowManager.addView(mLockView, mLockViewLayoutParams);
}
isLocked = true;
}
public synchronized void unlock() {
if(mWindowManager!=null&&isLocked){
mWindowManager.removeView(mLockView);
}
isLocked = false;
}
public synchronized void setLockView(View v){
mLockView = v;
}
}
copy模式结束。
manifest.xml 添加权限
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
<uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW" />
最近研究锁屏,按照常规的方法,常规方法如下
Java代码
public void onAttachedToWindow()
{
this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
super.onAttachedToWindow();
}
但是这个方法到了4.0的系统上就失效了,按home照样会返回桌面。apktool了几个锁屏的软件之后发现其实现方法,即用WindowManager的addview方法将view加到窗口上,加上的时候将view的layoutparamas的type设为LayoutParams.TYPE_SYSTEM_ERROR,这个值sdk的解释为
Java代码
public static final int TYPE_SYSTEM_ERROR
Since: API Level 1
Window type: internal system error windows, appear on top of everything they can.
如果直接这样用会报错,还要在AndroidManifest.xml里面加上权限<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>,ok上完整代码,封装了一个类,其中Lock和hide方法实现锁屏和解锁。
Java代码
public class LockLayer {
private Activity mActivty;
private WindowManager mWindowManager;
private View mLockView;
private LayoutParams mLockViewLayoutParams;
public LockLayer(Activity act) {
mActivty = act;
init();
}
private void init(){
mWindowManager = mActivty.getWindowManager();
mLockViewLayoutParams = new LayoutParams();
mLockViewLayoutParams.width = LayoutParams.MATCH_PARENT;
mLockViewLayoutParams.height = LayoutParams.MATCH_PARENT;
//实现关键
mLockViewLayoutParams.type = LayoutParams.TYPE_SYSTEM_ERROR;
//apktool value,这个值具体是哪个变量还请网友帮忙
mLockViewLayoutParams.flags = 1280;
}
public void lock() {
if(mLockView!=null){
mWindowManager.addView(mLockView, mLockViewLayoutParams);
}
}
public void unlock() {
if(mWindowManager!=null){
mWindowManager.removeView(mLockView);
}
}
public void setLockView(View v){
mLockView = v;
}
}
使用方法如下
Java代码
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View lock = View.inflate(this, R.layout.main, null);
LockLayer lockLayer = new LockLayer(this);
lockLayer.setLockView(lock);
lockLayer.lock();
}
ok,这时可以实现按home键不返回桌面的效果,其他的键需要用另外的代码实现,网上都有。这段代码只调用一次的时候没有问题,但是如果遇到多线程或者多次lock和hide就会有问题,修改如下,一是将LockLayer改为单例模式,二是在hide和lock的时候先判断状态。修改后代码如下
Java代码
public class LockLayer {
private Activity mActivty;
private WindowManager mWindowManager;
private View mLockView;
private LayoutParams mLockViewLayoutParams;
private static LockLayer mLockLayer;
private boolean isLocked;
public static synchronized LockLayer getInstance(Activity act){
if(mLockLayer == null){
mLockLayer = new LockLayer(act);
}
return mLockLayer;
}
private LockLayer(Activity act) {
mActivty = act;
init();
}
private void init(){
isLocked = false;
mWindowManager = mActivty.getWindowManager();
mLockViewLayoutParams = new LayoutParams();
mLockViewLayoutParams.width = LayoutParams.MATCH_PARENT;
mLockViewLayoutParams.height = LayoutParams.MATCH_PARENT;
//实现关键
mLockViewLayoutParams.type = LayoutParams.TYPE_SYSTEM_ERROR;
//apktool value,这个值具体是哪个变量还请网友帮忙
mLockViewLayoutParams.flags = 1280;
}
public synchronized void lock() {
if(mLockView!=null&&!isLocked){
mWindowManager.addView(mLockView, mLockViewLayoutParams);
}
isLocked = true;
}
public synchronized void unlock() {
if(mWindowManager!=null&&isLocked){
mWindowManager.removeView(mLockView);
}
isLocked = false;
}
public synchronized void setLockView(View v){
mLockView = v;
}
}
copy模式结束。
manifest.xml 添加权限
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
<uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW" />
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