我们有一个程序，安装在手机上并将手机借给用户使用一段时间。我们希望这些手机只用于运行我们的应用程序（无电话、无游戏等）。这些手机将被root（超级管理员权限）。
所以我们需要以下功能：
它不必是“防黑客级别”，但应足以防止普通用户对设备进行操作。
这是否可行？我已经在Symbian和Windows Mobile上做过类似的事情，但在Android上我没有太多经验。如何实现这个目标？
更新2015年: 如果您不介意限制您的应用程序只针对单独的手机厂商，三星已经推出了KNOX SDK，可以轻松实现展示模式和更多功能而无需root手机。详情请访问：https://seap.samsung.com/developer/sdk/knox-standard-android
是可以的，但你无法控制 Home 键 和 结束通话键 的行为。
要全屏，请在清单文件中的活动标签添加 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"。
要禁用来电，你需要监听电话:
import android.app.Service;
import android.os.IBinder;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
public class MyPhoneStateListener extends Service{
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
StateListener phoneStateListener = new StateListener();
TelephonyManager telephonymanager = (TelephonyManager)getSystemService(TELEPHONY_SERVICE);
telephonymanager.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
}
class StateListener extends PhoneStateListener{
@Override
public void onCallStateChanged(int state, String incomingNumber) {
super.onCallStateChanged(state, incomingNumber);
switch(state){
case TelephonyManager.CALL_STATE_RINGING:
//Disconnect the call here...
break;
case TelephonyManager.CALL_STATE_OFFHOOK:
break;
case TelephonyManager.CALL_STATE_IDLE:
break;
}
}
};
@Override
public void onDestroy() {
}
}
注意：在停止服务时，不要忘记移除监听器并将这些权限添加到您的清单文件中：
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
并且以编程方式断开通话：
try{
TelephonyManager manager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
Class c = Class.forName(manager.getClass().getName());
Method m = c.getDeclaredMethod("getITelephony");
m.setAccessible(true);
ITelephony telephony = (ITelephony)m.invoke(manager);
telephony.endCall();
} catch(Exception e){
Log.d("",e.getMessage());
}
注意：添加此文件以断开通话： http://dl.dropbox.com/u/31740476/ITelephony.aidl
要禁用按键，您需要覆盖：
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
if(KeyEvent.KEYCODE_MENU == event.getKeyCode() || KeyEvent.KEYCODE_DPAD_LEFT==event.getKeyCode()
|| KeyEvent.KEYCODE_DPAD_DOWN==event.getKeyCode() || KeyEvent.KEYCODE_DPAD_RIGHT==event.getKeyCode()
|| KeyEvent.KEYCODE_DPAD_UP==event.getKeyCode() || KeyEvent.KEYCODE_DPAD_CENTER==event.getKeyCode()
|| KeyEvent.KEYCODE_BACK==event.getKeyCode())
{
return false;
}
return true;
}
按下Home键后，将回到主屏幕，为了克服这个问题，您需要实现一个服务，并在其中实现一个无限线程来重新启动您的应用程序，就象这样:
public class AppTrackingService extends Service {
private RunnableThread thread;
private Context ctx;
@Override
public IBinder onBind(Intent intent) {
return null;
}
public void onCreate(){
super.onCreate();
ctx = AppTrackingService.this;
thread = new RunnableThread();
}
public void onStart(Intent intent, int startid) {
try{
if(thread==null) thread = new RunnableThread();
thread.startThread();
}catch(Exception e){ }
}
class RunnableThread extends Thread {
Handler back_handler = new Handler();
boolean isContinue = false;
public RunnableThread(){
isContinue = false;
}
public void setIsContinue(boolean val){
this.isContinue = val;
}
public void startThread(){
isContinue = true;
start();
}
public void run(){
ActivityManager actMngr = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
while(isContinue){
try{
//Maintain a boolean "isyourapprunning" to know if your app was running or not....
if(isyourapprunning){
String runningPkg = actMngr.getRunningTasks(1).get(0).topActivity.getPackageName();
if (!runningPkg.equals(ctx.getPackageName())){
launchApp(ctx.getPackageName());
}
Thread.sleep(2500); //2.5 secs
}else{
isContinue = false;
stopSelf();
}
}catch(Exception e){ }
}//end of while loop
}
protected void launchApp(String packageName) {
Intent mIntent = getPackageManager().getLaunchIntentForPackage(packageName);
mIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
mIntent.addFlags(Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
if (null != mIntent) {
try {
startActivity(mIntent);
} catch(Exception e) { }
}
}
}
}
编辑
你需要添加以下权限才能结束通话：
<uses-permission android:name="android.permission.CALL_PHONE" />
你可以使用以下的AIDL文件：
package com.android.internal.telephony;
/**
* Interface used to interact with the phone. Mostly this is used by the
* TelephonyManager class. A few places are still using this directly.
* Please clean them up if possible and use TelephonyManager instead.
*
* {@hide}
*/
interface ITelephony {
/**
* End call if there is a call in progress, otherwise does nothing.
*
* @return whether it hung up
*/
boolean endCall();
/**
* Silence the ringer if an incoming call is currently ringing.
* (If vibrating, stop the vibrator also.)
*
* It's safe to call this if the ringer has already been silenced, or
* even if there's no incoming call. (If so, this method will do nothing.)
*
* TODO: this should be a oneway call too (see above).
* (Actually *all* the methods here that return void can
* probably be oneway.)
*/
void silenceRinger();
}
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.CALL_PHONE"/>
READ_PHONE_STATE权限是不够的，您还需要CALL_PHONE权限才能结束通话。<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.CALL_PHONE"/>
你也可以看一下这个链接：https://github.com/ligi/Setec-Astronomy。抱歉打扰，但我们在这里有类似的问题；-）
Method m = c.getDeclaredMethod("getITelephony");处出现了NoSuchMethodException异常，如何避免它？ - uniruddh