@Override public void onAttachedToWindow() { this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); // TYPE_KEYGUARD_DIALOG super.onAttachedToWindow(); }
最近研究锁屏,按照常规的方法,常规方法如下 Java代码 收藏代码 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 收藏代码 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 收藏代码 public class LockLayer { private Activity mActivty; private WindowManager mWindowManager; private View mLockView; private LayoutParams mLockViewLayoutParams;
public LockLayer(Activity act) { mActivty = act; init(); }
做一个应用和定制一个系统ROM肯定不是一个工作量
@Override
public void onAttachedToWindow() {
this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); // TYPE_KEYGUARD_DIALOG
super.onAttachedToWindow();
}
public void onAttachedToWindow() {
super.onAttachedToWindow();
this.getWindow().addFlags(WindowManager.LayoutParams.FLAG_HOMEKEY_DISPATCHED);
}
public void onAttachedToWindow() {
this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); // TYPE_KEYGUARD_DIALOG
super.onAttachedToWindow();
}
Java代码 收藏代码 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 收藏代码 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 收藏代码 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 收藏代码 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 收藏代码 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;
}
} 还有个问题是mLockViewLayoutParams.flags = 1280;1280这个值具体是哪个变量还不知道,有知道的留个言。 LockScreen.zip (148.2 KB)
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this.getWindow().setHomeKeyEnable(
WindowManager.LayoutParams.HOME_KEY_INTERCEPT_ENABLE); this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
super.onAttachedToWindow();
}4.0之后的版本,屏蔽Home键,需如此做
不靠谱,sdk中红色的方法setHomeKeyEnable和flag HOME_KEY_INTERCEPT_ENABLE都没有啊。
不靠谱,sdk中红色的方法setHomeKeyEnable和flag HOME_KEY_INTERCEPT_ENABLE都没有啊。
这个应该是 FLAG_HOMEKEY_DISPATCHED
直接setAttributes传进去就可以了
this.getWindow().setFlags(FLAG_HOMEKEY_DISPATCHED, FLAG_HOMEKEY_DISPATCHED);之后在onKeyDown里写相应的逻辑。刚刚解决这个问题。