位置 sendExtraCommands - 方法不起作用并关闭应用程序
location sendExtraCommands - Method does not work and shutts down the app
我尝试使用 sendExtraCommand() 方法以编程方式清除智能手机的 gps 芯片。在我的清单文件中，我添加了发送额外命令的权限，如下所示：
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"/>
我这样调用方法本身：
locationManager.sendExtraCommand(LocationManager.GPS_PROVIDER, "delete_aiding_data", null)
当我在模拟器或智能手机上尝试时，应用程序崩溃了。我不知道我做错了什么，所以如果有人能看看我的问题，我将不胜感激。
我唯一的activity，MainActivity：
public class MainActivity extends AppCompatActivity {
private TextView textView;
private Button button;
private LocationManager locationManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.txtView1);
textView.setText("Gps Reset: ");
button = (Button) findViewById(R.id.button);
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
boolean enabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
System.out.println(enabled);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
sendXtraCommand();
}
});
}
private void sendXtraCommand(){
boolean reset = locationManager.sendExtraCommand(LocationManager.GPS_PROVIDER, "delete_aiding_data", null);
if(reset){
textView.append("true");
}else{
textView.append("false");
}
}
}
这是我的清单文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.felix.resetgps">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-feature android:name="android.hardware.location.gps" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
这是我在控制台上收到的消息：
11/25 14:32:41: Launching app
$ adb shell am start -n "com.example.felix.resetgps/com.example.felix.resetgps.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER -D
Waiting for application to come online: com.example.felix.resetgps | com.example.felix.resetgps.test
Waiting for application to come online: com.example.felix.resetgps | com.example.felix.resetgps.test
Connecting to com.example.felix.resetgps
I/art: Not late-enabling -Xcheck:jni (already on)
W/art: Unexpected CPU variant for X86 using defaults: x86
W/ActivityThread: Application com.example.felix.resetgps is waiting for the debugger on port 8100...
I/System.out: Sending WAIT chunk
[ 11-25 13:32:41.598 1794: 1815 D/ ]
HostConnection::get() New Host Connection established 0x8bf7f400, tid 1815
I/art: Debugger is active
Connected to the target VM, address: 'localhost:8615', transport: 'socket'
I/System.out: Debugger has connected
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: debugger has settled (1396)
W/System: ClassLoader referenced unknown path: /data/app/com.example.felix.resetgps-1/lib/x86
I/InstantRun: Instant Run Runtime started. Android package is com.example.felix.resetgps, real application class is null.
W/System: ClassLoader referenced unknown path: /data/app/com.example.felix.resetgps-1/lib/x86
I/art: Starting a blocking GC Instrumentation
W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
I/System.out: true
I/OpenGLRenderer: Initialized EGL, version 1.4
D/OpenGLRenderer: Swap behavior 1
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.felix.resetgps, PID: 4869
java.lang.SecurityException: "gps" location provider requires ACCESS_FINE_LOCATION permission.
at android.os.Parcel.readException(Parcel.java:1683)
at android.os.Parcel.readException(Parcel.java:1636)
at android.location.ILocationManager$Stub$Proxy.sendExtraCommand(ILocationManager.java:1274)
at android.location.LocationManager.sendExtraCommand(LocationManager.java:2226)
at com.example.felix.resetgps.MainActivity.sendXtraCommand(MainActivity.java:51)
at com.example.felix.resetgps.MainActivity.access[=12=]0(MainActivity.java:16)
at com.example.felix.resetgps.MainActivity.onClick(MainActivity.java:44)
at android.view.View.performClick(View.java:5610)
at android.view.View$PerformClick.run(View.java:22265)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
Disconnected from the target VM, address: 'localhost:8615', transport: 'socket'
如果你仔细看log cat你会发现
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
不见了。
对于Android 运行 on Android 6.0 (API level 23) 及以上，我们需要添加运行时权限才能工作。
参考这个答案来实现它：
我尝试使用 sendExtraCommand() 方法以编程方式清除智能手机的 gps 芯片。在我的清单文件中，我添加了发送额外命令的权限，如下所示：
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"/>
我这样调用方法本身：
locationManager.sendExtraCommand(LocationManager.GPS_PROVIDER, "delete_aiding_data", null)
当我在模拟器或智能手机上尝试时，应用程序崩溃了。我不知道我做错了什么，所以如果有人能看看我的问题，我将不胜感激。
我唯一的activity，MainActivity：
public class MainActivity extends AppCompatActivity {
private TextView textView;
private Button button;
private LocationManager locationManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.txtView1);
textView.setText("Gps Reset: ");
button = (Button) findViewById(R.id.button);
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
boolean enabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
System.out.println(enabled);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
sendXtraCommand();
}
});
}
private void sendXtraCommand(){
boolean reset = locationManager.sendExtraCommand(LocationManager.GPS_PROVIDER, "delete_aiding_data", null);
if(reset){
textView.append("true");
}else{
textView.append("false");
}
}
}
这是我的清单文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.felix.resetgps">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-feature android:name="android.hardware.location.gps" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
这是我在控制台上收到的消息：
11/25 14:32:41: Launching app
$ adb shell am start -n "com.example.felix.resetgps/com.example.felix.resetgps.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER -D
Waiting for application to come online: com.example.felix.resetgps | com.example.felix.resetgps.test
Waiting for application to come online: com.example.felix.resetgps | com.example.felix.resetgps.test
Connecting to com.example.felix.resetgps
I/art: Not late-enabling -Xcheck:jni (already on)
W/art: Unexpected CPU variant for X86 using defaults: x86
W/ActivityThread: Application com.example.felix.resetgps is waiting for the debugger on port 8100...
I/System.out: Sending WAIT chunk
[ 11-25 13:32:41.598 1794: 1815 D/ ]
HostConnection::get() New Host Connection established 0x8bf7f400, tid 1815
I/art: Debugger is active
Connected to the target VM, address: 'localhost:8615', transport: 'socket'
I/System.out: Debugger has connected
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: debugger has settled (1396)
W/System: ClassLoader referenced unknown path: /data/app/com.example.felix.resetgps-1/lib/x86
I/InstantRun: Instant Run Runtime started. Android package is com.example.felix.resetgps, real application class is null.
W/System: ClassLoader referenced unknown path: /data/app/com.example.felix.resetgps-1/lib/x86
I/art: Starting a blocking GC Instrumentation
W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
I/System.out: true
I/OpenGLRenderer: Initialized EGL, version 1.4
D/OpenGLRenderer: Swap behavior 1
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.felix.resetgps, PID: 4869
java.lang.SecurityException: "gps" location provider requires ACCESS_FINE_LOCATION permission.
at android.os.Parcel.readException(Parcel.java:1683)
at android.os.Parcel.readException(Parcel.java:1636)
at android.location.ILocationManager$Stub$Proxy.sendExtraCommand(ILocationManager.java:1274)
at android.location.LocationManager.sendExtraCommand(LocationManager.java:2226)
at com.example.felix.resetgps.MainActivity.sendXtraCommand(MainActivity.java:51)
at com.example.felix.resetgps.MainActivity.access[=12=]0(MainActivity.java:16)
at com.example.felix.resetgps.MainActivity.onClick(MainActivity.java:44)
at android.view.View.performClick(View.java:5610)
at android.view.View$PerformClick.run(View.java:22265)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
Disconnected from the target VM, address: 'localhost:8615', transport: 'socket'
如果你仔细看log cat你会发现
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
不见了。
对于Android 运行 on Android 6.0 (API level 23) 及以上，我们需要添加运行时权限才能工作。
参考这个答案来实现它：