监听HOME键

加权限禁用键盘守卫

<uses-permission android:name="android.permission.DISABLE_KEYGUARD"></uses-permission>

重写两个方法

@Override
    public void onAttachedToWindow() {
        this.getWindow().setType(
                WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
        super.onAttachedToWindow();
    }

    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        // TODO Auto-generated method stub
        if(event.getKeyCode() == KeyEvent.KEYCODE_HOME) {
            Toast.makeText(this, "a", Toast.LENGTH_SHORT).show();
        }
        //使用转到桌面代码
        ntent mHomeIntent = new Intent(Intent.ACTION_MAIN, null);
        mHomeIntent.addCategory(Intent.CATEGORY_HOME);
        mHomeIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
        startActivity(mHomeIntent);
        return super.dispatchKeyEvent(event);
    }

此代码从2.3之后好像就没用了

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