今天我使用切换按钮完成了一项任务。当我按下启用切换按钮时，需要打开移动数据，当我按下相同按钮时应该关闭它。我已经做了所有事情，当我按下启用按钮时，移动数据仍然保持关闭状态。实际上我已经添加了所有的清单权限。当我按下切换按钮时，移动数据应该打开。请帮助我的朋友，也让我知道我犯了错误的地方。我特此附上我的XML和Java编码。请各位朋友帮助，非常感谢。
MainActivity.java：
import android.app.Activity;
import android.content.Context;
import android.net.ConnectivityManager;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;
import android.os.Bundle;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class MainActivity extends Activity{
// constants
static final String STATUS_ON = "Mobile Data: Enable";
static final String STATUS_OFF = "Mobile Data: Disable";
static final String TURN_ON = "Enable";
static final String TURN_OFF = "Disable";
// controls
TextView TVMobileData;
ToggleButton tBMobileData;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// load controls
TVMobileData=(TextView)findViewById(R.id.TVMobileData);
tBMobileData=(ToggleButton)findViewById(R.id.tBMobileData);
// set click event for button
tBMobileData.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// check current state first
boolean state = isMobileDataEnable();
// toggle the state
if(state)toggleMobileDataConnection(false);
else toggleMobileDataConnection(true);
// update UI to new state
updateUI(!state);
}
});
}
public void updateUI(boolean state) {
//set text according to state
if(state) {
TVMobileData.setText(STATUS_ON);
tBMobileData.setText(TURN_OFF);
} else {
TVMobileData.setText(STATUS_OFF);
tBMobileData.setText(TURN_ON);
}
}
public boolean isMobileDataEnable() {
boolean mobileDataEnabled = false; // Assume disabled
ConnectivityManager cm = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);
try {
Class cmClass = Class.forName(cm.getClass().getName());
Method method = cmClass.getDeclaredMethod("getMobileDataEnabled");
method.setAccessible(true); // Make the method callable
// get the setting for "mobile data"
mobileDataEnabled = (Boolean)method.invoke(cm);
} catch (Exception e) {
// Some problem accessible private API and do whatever error handling you want here
}
return mobileDataEnabled;
}
public boolean toggleMobileDataConnection(boolean ON)
{
try {
//create instance of connectivity manager and get system connectivity service
final ConnectivityManager conman = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);
//create instance of class and get name of connectivity manager system service class
final Class conmanClass = Class.forName(conman.getClass().getName());
//create instance of field and get mService Declared field
final Field iConnectivityManagerField= conmanClass.getDeclaredField("mService");
//Attempt to set the value of the accessible flag to true
iConnectivityManagerField.setAccessible(true);
//create instance of object and get the value of field conman
final Object iConnectivityManager = iConnectivityManagerField.get(conman);
//create instance of class and get the name of iConnectivityManager field
final Class iConnectivityManagerClass= Class.forName(iConnectivityManager.getClass().getName());
//create instance of method and get declared method and type
final Method setMobileDataEnabledMethod= iConnectivityManagerClass.getDeclaredMethod("setMobileDataEnabled",Boolean.TYPE);
//Attempt to set the value of the accessible flag to true
setMobileDataEnabledMethod.setAccessible(true);
//dynamically invoke the iConnectivityManager object according to your need (true/false)
setMobileDataEnabledMethod.invoke(iConnectivityManager, ON);
} catch (Exception e){
}
return true;
}
}
activity_main.xml中：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="arun.com.togglebuttonexample.MainActivity">
<TextView
android:id="@+id/TVMobileData"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="90dp"
android:text="Mobile Data: Disable"
android:textColor="#1BD6E0"
android:textSize="40sp" />
<ToggleButton
android:id="@+id/tBMobileData"
android:layout_width="225dp"
android:layout_height="225dp"
android:layout_centerInParent="true"
android:textSize="30sp"
android:textOff="Enable"
android:textOn="Disable" />
</RelativeLayout>
的AndroidManifest.xml：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="arun.com.togglebuttonexample">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_SETTINGS"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
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>
答案 0 :(得分：1)
您可以在android 4.4下面的programmaticaly上访问/关闭移动数据，但不能超过4.4，因为它需要MODIFY_PHONE_STATE权限检查。此权限仅授予系统或签名应用程序。所以它不适用于非根电话。