从 Android 4.2 开始,不支持使用普通 API 打开/关闭飞行模式。
当授予 WRITE_SECURE_SETTINGS 权限时,它可能应该可以工作,但这仅适用于系统应用程序(如我所读)。
应该怎么做才能在具有 root 权限的设备上执行此操作?
系统应用程序是否也需要 root 才能切换飞行模式?
要在 Android根设备(手机、平板电脑、便笺)上打开和关闭飞行/飞行模式,您可以执行以下操作:
private final String COMMAND_FLIGHT_MODE_1 = "settings put global airplane_mode_on";
private final String COMMAND_FLIGHT_MODE_2 = "am broadcast -a android.intent.action.AIRPLANE_MODE --ez state";
@SuppressLint("NewApi")
@SuppressWarnings("deprecation")
public void setFlightMode(Context context) {
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN) {
// API 17 onwards.
if (isRooted(context)) {
int enabled = isFlightModeEnabled(context) ? 0 : 1;
// Set Airplane / Flight mode using su commands.
String command = COMMAND_FLIGHT_MODE_1 + " " + enabled;
executeCommandWithoutWait(context, "-c", command);
command = COMMAND_FLIGHT_MODE_2 + " " + enabled;
executeCommandWithoutWait(context, "-c", command);
} else {
try {
// No root permission, just show Airplane / Flight mode setting screen.
Intent intent = new Intent(Settings.ACTION_AIRPLANE_MODE_SETTINGS);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
} catch (ActivityNotFoundException e) {
Log.e(TAG, "Setting screen not found due to: " + e.fillInStackTrace());
}
}
} else {
// API 16 and earlier.
boolean enabled = isFlightModeEnabled(context);
Settings.System.putInt(context.getContentResolver(), Settings.System.AIRPLANE_MODE_ON, enabled ? 0 : 1);
Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
intent.putExtra("state", !enabled);
context.sendBroadcast(intent);
}
要检查飞行/飞行模式是否已经打开和关闭,请执行以下操作:
@SuppressLint("NewApi")
@SuppressWarnings("deprecation")
private boolean isFlightModeEnabled(Context context) {
boolean mode = false;
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN) {
// API 17 onwards
mode = Settings.Global.getInt(context.getContentResolver(), Settings.Global.AIRPLANE_MODE_ON, 0) == 1;
} else {
// API 16 and earlier.
mode = Settings.System.getInt(context.getContentResolver(), Settings.System.AIRPLANE_MODE_ON, 0) == 1;
}
return mode;
}
要执行su
命令,请执行以下操作:
private void executeCommandWithoutWait(Context context, String option, String command) {
boolean success = false;
String su = "su";
for (int i=0; i < 3; i++) {
// "su" command executed successfully.
if (success) {
// Stop executing alternative su commands below.
break;
}
if (i == 1) {
su = "/system/xbin/su";
} else if (i == 2) {
su = "/system/bin/su";
}
try {
// execute command
Runtime.getRuntime().exec(new String[]{su, option, command});
} catch (IOException e) {
Log.e(TAG, "su command has failed due to: " + e.fillInStackTrace());
}
}
}
或者,如果您的应用:
/system/app/
目录;和AndroidManifest.xml
(例如WRITE_SECURE_SETTINGS
,等)。那么你可以这样做:
Settings.Global.putInt(context.getContentResolver(), Settings.Global.AIRPLANE_MODE_ON, isEnabled ? 0 : 1);
由于其中定义的任何内容Settings.Global
都可以由系统应用程序读写 - 甚至是作为系统应用程序创建的第三方应用程序。