运用反射格式化SD卡

前些日子要求做格式化SD卡，没办法找了很多都不行，后来找到一个大概的，但是忘记了是哪，所以忘记出处在哪了

这里我的SD卡的路径是因为内部做了swap，交换了内置SD卡 和外置SD卡的路径，所以我写死了

格式化SD卡(运用反射调用隐藏方法)

public int formatSDCard() {

try {

int count=0;

Method getService = Class.forName("android.os.ServiceManager").getMethod("getService", String.class);

Object service = getService.invoke(null, "mount");

Class Stub = Class.forName("android.os.storage.IMountService$Stub");

Method asInterface = Stub.getMethod("asInterface", Class.forName("android.os.IBinder"));

Object mountServ = asInterface.invoke(null, service);

//卸载SD卡

Method unmountVolume = mountServ.getClass().getMethod("unmountVolume", String.class, boolean.class, boolean.class);

unmountVolume.invoke(mountServ, "/storage/sdcard0", true, true);

while (Environment.isExternalStorageRemovable()&&count<30) {

Log.i("TAG", "SD卡还未被完全卸载");

SystemClock.sleep(1000);

count++;

}

//格式化SD卡，返回结果为0则成功，否则失败

Method formatVolume = mountServ.getClass().getMethod("formatVolume", String.class);

Object ob = formatVolume.invoke(mountServ, "/storage/sdcard1");

Log.i("Tag", " m格式化结果 = " + ob);

SystemClock.sleep(2000);

if (ob != null && (Integer)ob == 0) {

Method mountVolume = mountServ.getClass().getMethod("mountVolume", String.class);

Object om = mountVolume.invoke(mountServ, "/storage/sdcard1");

Log.i("Tag", "m挂载结果SD卡= " + om);

if (om != null && (Integer)om == 0) {

return 0;

}

}

} catch (InvocationTargetException e) {

Log.i("TAG", "此处接收被调用方法内部未被捕获的异常");

Throwable t = e.getTargetException();// 获取目标异常

t.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

}

return -1;

}