[英]How to enable mobile hotspot programmatically in marshmallow and above android version?
我嘗試使用以下代碼在Android Marshmallow中創建wifi tethering Hotspot。
public class WifiAccessManager {
private static final String SSID = "mHotspot";
public static boolean setWifiApState(Context context, boolean enabled) {
//config = Preconditions.checkNotNull(config);
try {
WifiManager mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
if (enabled) {
mWifiManager.setWifiEnabled(false);
}
WifiConfiguration conf = getWifiApConfiguration();
mWifiManager.addNetwork(conf);
return (Boolean) mWifiManager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class).invoke(mWifiManager, conf, enabled);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
public static WifiConfiguration getWifiApConfiguration() {
WifiConfiguration conf = new WifiConfiguration();
conf.SSID = SSID;
conf.allowedKeyManagement.set(Integer.parseInt("12345678"));
return conf;
}
}
而且我已經允許在我的清單文件中訪問wifi
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
但它不會在棉花糖及以上版本中激活。
每當我啟用熱點時,我都會收到此錯誤
08-18 13:56:32.304 27844-27844/com.example.deneebo.ffconnect W/System.err: java.lang.reflect.InvocationTargetException
08-18 13:56:32.304 27844-27844/com.example.deneebo.ffconnect W/System.err: at java.lang.reflect.Method.invoke(Native Method)
08-18 13:56:32.304 27844-27844/com.example.deneebo.ffconnect W/System.err: at com.example.deneebo.ffconnect.WifiAccessManager.setWifiApState(WifiAccessManager.java:28)
08-18 13:56:32.304 27844-27844/com.example.deneebo.ffconnect W/System.err: at com.example.deneebo.ffconnect.DeviceFoundActivity.onCreate(DeviceFoundActivity.java:72)
08-18 13:56:32.304 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.app.Activity.performCreate(Activity.java:6689)
08-18 13:56:32.304 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1140)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2709)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2825)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.app.ActivityThread.-wrap12(ActivityThread.java)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1557)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.os.Handler.dispatchMessage(Handler.java:110)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.os.Looper.loop(Looper.java:203)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.app.ActivityThread.main(ActivityThread.java:6339)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at java.lang.reflect.Method.invoke(Native Method)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1084)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:945)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: Caused by: java.lang.SecurityException: com.example.deneebo.ffconnect was not granted this permission: android.permission.WRITE_SETTINGS.
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.os.Parcel.readException(Parcel.java:1684)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.os.Parcel.readException(Parcel.java:1637)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.net.wifi.IWifiManager$Stub$Proxy.setWifiApEnabled(IWifiManager.java:1888)
08-18 13:56:32.305 27844-27844/com.example.deneebo.ffconnect W/System.err: at android.net.wifi.WifiManager.setWifiApEnabled(WifiManager.java:1748)
08-18 13:56:32.306 27844-27844/com.example.deneebo.ffconnect W/System.err: ... 15 more
請幫助解決這個問題。
謝謝
最后,我從Google的開發者網站獲得了解決方案
https://developer.android.com/reference/android/Manifest.permission.html#WRITE_SETTINGS
我在清單文件中添加了以下權限
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
並在我的代碼中添加以下行
> if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
> if (!Settings.System.canWrite(getApplicationContext())) {
> Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS, Uri.parse("package:" +
> getPackageName()));
> startActivityForResult(intent, 200);
>
> }
> }
非常感謝你幫助Mr.lorenzo-s
來自日志的問題是:
Caused by: java.lang.SecurityException: com.example.deneebo.ffconnect was not granted this permission: android.permission.WRITE_SETTINGS
您的應用需要android.permission.WRITE_SETTINGS
權限,而在Marshmallow中,只需在清單中聲明該權限即可授予此權限。 這是他們為加強安全所做的改變。
您必須要求您的用戶允許您的應用明確使用該權限。 您可以在此答案中找到更多信息。
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