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[英]Disable back, Home and Recent button in android programmatically
[英]Disable device's home button programmatically in android
我是 android 新手,正在开发具有锁定功能的 android 应用程序。我想在活动中禁用设备的主页按钮,我从过去 4 天开始搜索它,但我没有得到正确的解决方案。我尝试了所有解决方案我进入下面的链接,但我无法禁用主页按钮。请建议我如何以编程方式禁用主页和所有设备的密钥。任何帮助将不胜感激。
这是我访问并尝试了描述他们的解决方案的链接。
如何以编程方式禁用android硬件按钮?
http://sunil-android.blogspot.in/2013/07/mostly-used-android-code.html
http://www.technonutty.com/2013/11/disable-home-power-back-button-android.html
这是我最后编辑的代码:
MainActivity.java
package com.example.lockdemo;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
private LockLayer lockLayer;
private View lockView;
Button button1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
init();
button1 = (Button)lockView.findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
lockLayer.unlock();
finish();
}
});
}
private void init() {
lockView = View.inflate(this, R.layout.activity_main, null);
lockLayer = LockLayer.getInstance(this);
lockLayer.setLockView(lockView);
lockLayer.lock();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
LockLayer.java
public class LockLayer {
private Activity mActivty;
private WindowManager mWindowManager;
private View mLockView;
private LayoutParams mLockViewLayoutParams;
private static LockLayer mLockLayer;
private boolean isLocked;
public static 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;
mLockViewLayoutParams.type = LayoutParams.TYPE_SYSTEM_ERROR;
}
public void lock() {
if(mLockView!=null){
mWindowManager.addView(mLockView, mLockViewLayoutParams);
}
isLocked = true;
}
public void unlock() {
if(mWindowManager!=null && isLocked){
mWindowManager.removeView(mLockView);
}
isLocked = false;
}
public void setLockView(View v){
mLockView = v;
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.lockdemo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".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>
</application>
</manifest>
谢谢你。
在您的项目manifest.xml文件中添加此行
<uses-permission android:name="android.permission.REORDER_TASKS" />
而这个在您的活动中逐渐减少
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
在您的活动中像这样修改onPause方法
@Override
protected void onPause() {
super.onPause();
ActivityManager activityManager = (ActivityManager) getApplicationContext()
.getSystemService(Context.ACTIVITY_SERVICE);
activityManager.moveTaskToFront(getTaskId(), 0);
}
在您的活动中重写onKeyDown方法
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// Do nothing or catch the keys you want to block
}
首先,我想说,“主页”按钮比其他按键更难禁用的原因-不应该这样做。 您可以想象有多少恶意应用程序会这样做。 即使您实现了它,它也将需要一些强大的权限,这将使人们重新考虑使用您的应用程序。 我看到成功完成此操作的唯一方法是使用自定义启动器
如果您有合法需要,则可以使用以下方法-但通知栏仍然可用,这是与您的问题无关的问题,但可能仍然有用。
@Override
public void onAttachedToWindow() {
getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
super.onAttachedToWindow();
}
同样的答案,可以发现这里对其中还包含其他一些有用的答案的问题
禁用主页就像用户可以单击它但没有任何操作,在这种情况下,您可以全屏显示,也可以通过在活动类中使用以下代码隐藏完整的导航栏
public void hideNavBtn(boolean hide){
// if (hide || !hide) return; //for testing other way to lock
WindowInsetsControllerCompat windowInsetsController =
ViewCompat.getWindowInsetsController(getWindow().getDecorView());
if (windowInsetsController == null) {
return;
}
windowInsetsController.setSystemBarsBehavior(WindowInsetsControllerCompat.BEHAVIOR_SHOW_BARS_BY_SWIPE);
if(hide) {
// Hide the system bars and nav bars.
// windowInsetsController.hide(WindowInsetsCompat.Type.systemBars());
windowInsetsController.hide(WindowInsetsCompat.Type.navigationBars());
}
else
{
// Show the system bars and nav bars.
// windowInsetsController.show(WindowInsetsCompat.Type.systemBars());
windowInsetsController.show(WindowInsetsCompat.Type.navigationBars());
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
hideNavBtn(true);
return super.onTouchEvent(event);
}
@Override
protected void onResume() {
super.onResume();
hideNavBtn(true);
}
只有从系统栏上滑动才会出现,或者如果你想输入代码
hideNavBtn(false);
在任何 viewOnClickListner 或 optionMenu
注意:如果您想同时隐藏系统栏和导航栏,只需取消注释以下代码并传递WindowInsetsCompat.Type.systemBars()
//int bothNavNSysBarHideNShow= WindowInsetsCompat.Type.systemBars()
// windowInsetsController.hide(bothNavNSysBarHideNShow);
//windowInsetsController.show(bothNavNSysBarHideNShow);
代替WindowInsetsCompat.Type.navigationBars()
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