android.content.Intent#writeToParcel ( )源码实例Demo

@Test
public void testDeepLinkIntent() {
    NavController navController = createNavController();
    navController.setGraph(R.navigation.nav_simple);

    Bundle args = new Bundle();
    args.putString("test", "test");
    TaskStackBuilder taskStackBuilder = navController.createDeepLink()
            .setDestination(R.id.second_test)
            .setArguments(args)
            .createTaskStackBuilder();

    Intent intent = taskStackBuilder.editIntentAt(0);
    assertThat(intent, is(notNullValue()));
    navController.onHandleDeepLink(intent);

    // The original Intent should be untouched and safely writable to a Parcel
    Parcel p = Parcel.obtain();
    intent.writeToParcel(p, 0);
}
 

public void startActivity(String deviceId, Intent intent) throws RemoteException {
    Parcel _data = Parcel.obtain();
    Parcel _reply = Parcel.obtain();
    try {
        _data.writeInterfaceToken(Stub.DESCRIPTOR);
        _data.writeString(deviceId);
        if (intent != null) {
            _data.writeInt(1);
            intent.writeToParcel(_data, 0);
        } else {
            _data.writeInt(0);
        }
        this.mRemote.transact(11, _data, _reply, 0);
        ExceptionUtils.readExceptionFromParcel(_reply);
    } finally {
        _reply.recycle();
        _data.recycle();
    }
}
 

public void sendBroadcast(String deviceId, Intent intent) throws RemoteException {
    Parcel _data = Parcel.obtain();
    Parcel _reply = Parcel.obtain();
    try {
        _data.writeInterfaceToken(Stub.DESCRIPTOR);
        _data.writeString(deviceId);
        if (intent != null) {
            _data.writeInt(1);
            intent.writeToParcel(_data, 0);
        } else {
            _data.writeInt(0);
        }
        this.mRemote.transact(12, _data, _reply, 0);
        ExceptionUtils.readExceptionFromParcel(_reply);
    } finally {
        _reply.recycle();
        _data.recycle();
    }
}
 

public void onPackageChange(String deviceId, Intent intent) throws RemoteException {
    Parcel _data = Parcel.obtain();
    Parcel _reply = Parcel.obtain();
    try {
        _data.writeInterfaceToken(Stub.DESCRIPTOR);
        _data.writeString(deviceId);
        if (intent != null) {
            _data.writeInt(1);
            intent.writeToParcel(_data, 0);
        } else {
            _data.writeInt(0);
        }
        this.mRemote.transact(5, _data, _reply, 0);
        _reply.readException();
    } finally {
        _reply.recycle();
        _data.recycle();
    }
}
 

@SuppressLint("Recycle")// when process dead, we should save time to restart and kill self, don`t take a waste of time to recycle
	private void initBroadcastParcel(Context context, String broadcastName){
		Intent intent = new Intent();
        ComponentName componentName = new ComponentName(context.getPackageName(), broadcastName);
        intent.setComponent(componentName);
        intent.setFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES);
		
		/*	 
//      Object contextImpl = ((Application)context.getApplicationContext()).getBaseContext();
        //this context is ContextImpl, get MainThread instance immediately
        Field mainThreadField = context.getClass().getDeclaredField("mMainThread");
        mainThreadField.setAccessible(true);
      	Object mainThread = mainThreadField.get(context);
      	//get ApplicationThread instance
      	Object applicationThread = mainThread.getClass().getMethod("getApplicationThread").invoke(mainThread);  
      	//get Binder
      	Binder callerBinder = (Binder) (applicationThread.getClass().getMethod("asBinder").invoke(applicationThread));
		 */
      
//      	UserHandle userHandle = android.os.Process.myUserHandle();
//      	int handle = (Integer) userHandle.getClass().getMethod("getIdentifier").invoke(userHandle);
		
      	mBroadcastData = Parcel.obtain();
      	mBroadcastData.writeInterfaceToken("android.app.IActivityManager");
//      	mBroadcastData.writeStrongBinder(callerBinder);
      	mBroadcastData.writeStrongBinder(null);
      	intent.writeToParcel(mBroadcastData, 0);
      	mBroadcastData.writeString(intent.resolveTypeIfNeeded(context.getContentResolver()));
      	mBroadcastData.writeStrongBinder(null);
      	mBroadcastData.writeInt(Activity.RESULT_OK);
      	mBroadcastData.writeString(null);
      	mBroadcastData.writeBundle(null);
      	mBroadcastData.writeString(null);
      	mBroadcastData.writeInt(-1);
      	mBroadcastData.writeInt(0);
      	mBroadcastData.writeInt(0);
//      	mBroadcastData.writeInt(handle);
      	mBroadcastData.writeInt(0);
	}
 

@SuppressLint("Recycle")// when process dead, we should save time to restart and kill self, don`t take a waste of time to recycle
	private void initServiceParcel(Context context, String serviceName){
		Intent intent = new Intent();
		ComponentName component = new ComponentName(context.getPackageName(), serviceName);
		intent.setComponent(component);
		
		/*  
        //get ContextImpl instance
//          Object contextImpl = ((Application)context.getApplicationContext()).getBaseContext();
          //this context is ContextImpl, get MainThread instance immediately
          Field mainThreadField = context.getClass().getDeclaredField("mMainThread");
          mainThreadField.setAccessible(true);
          Object mainThread = mainThreadField.get(context);
          //get ApplicationThread instance
          Object applicationThread = mainThread.getClass().getMethod("getApplicationThread").invoke(mainThread);  
          //get Binder
          Binder callerBinder = (Binder) (applicationThread.getClass().getMethod("asBinder").invoke(applicationThread));  
          */
          
          //get handle
//          UserHandle userHandle = android.os.Process.myUserHandle();
//          int handle = (Integer) userHandle.getClass().getMethod("getIdentifier").invoke(userHandle);
          
          //write pacel
          mServiceData = Parcel.obtain();
          mServiceData.writeInterfaceToken("android.app.IActivityManager");
          mServiceData.writeStrongBinder(null);
//          mServiceData.writeStrongBinder(callerBinder);
          intent.writeToParcel(mServiceData, 0);
          mServiceData.writeString(null);
//          mServiceData.writeString(intent.resolveTypeIfNeeded(context.getContentResolver()));
          mServiceData.writeInt(0);
//          mServiceData.writeInt(handle);
		
	}
 

@SuppressLint("Recycle")// when process dead, we should save time to restart and kill self, don`t take a waste of time to recycle
	private void initServiceParcel(Context context, String serviceName){
		Intent intent = new Intent();
		ComponentName component = new ComponentName(context.getPackageName(), serviceName);
		intent.setComponent(component);
		
		/*  
        //get ContextImpl instance
//          Object contextImpl = ((Application)context.getApplicationContext()).getBaseContext();
          //this context is ContextImpl, get MainThread instance immediately
          Field mainThreadField = context.getClass().getDeclaredField("mMainThread");
          mainThreadField.setAccessible(true);
          Object mainThread = mainThreadField.get(context);
          //get ApplicationThread instance
          Object applicationThread = mainThread.getClass().getMethod("getApplicationThread").invoke(mainThread);  
          //get Binder
          Binder callerBinder = (Binder) (applicationThread.getClass().getMethod("asBinder").invoke(applicationThread));  
          */
          
          //get handle
//          UserHandle userHandle = android.os.Process.myUserHandle();
//          int handle = (Integer) userHandle.getClass().getMethod("getIdentifier").invoke(userHandle);
          
          //write pacel
          mServiceData = Parcel.obtain();
          mServiceData.writeInterfaceToken("android.app.IActivityManager");
          mServiceData.writeStrongBinder(null);
//          mServiceData.writeStrongBinder(callerBinder);
          intent.writeToParcel(mServiceData, 0);
          mServiceData.writeString(null);
//          mServiceData.writeString(intent.resolveTypeIfNeeded(context.getContentResolver()));
          mServiceData.writeInt(0);
//          mServiceData.writeInt(handle);
		
	}
 

/**
 * Returns how large the Intent will be in Parcel form, which is helpful for gauging whether
 * Android will deliver the Intent instead of throwing a TransactionTooLargeException.
 *
 * @param intent Intent to get the size of.
 * @return Number of bytes required to parcel the Intent.
 */
public static int getParceledIntentSize(Intent intent) {
    Parcel parcel = Parcel.obtain();
    intent.writeToParcel(parcel, 0);
    return parcel.dataSize();
}
 

/**
 * Returns how large the Intent will be in Parcel form, which is helpful for gauging whether
 * Android will deliver the Intent instead of throwing a TransactionTooLargeException.
 *
 * @param intent Intent to get the size of.
 * @return Number of bytes required to parcel the Intent.
 */
public static int getParceledIntentSize(Intent intent) {
    Parcel parcel = Parcel.obtain();
    intent.writeToParcel(parcel, 0);
    return parcel.dataSize();
}
 

/**
 * Returns how large the Intent will be in Parcel form, which is helpful for gauging whether
 * Android will deliver the Intent instead of throwing a TransactionTooLargeException.
 *
 * @param intent Intent to get the size of.
 * @return Number of bytes required to parcel the Intent.
 */
public static int getParceledIntentSize(Intent intent) {
    Parcel parcel = Parcel.obtain();
    intent.writeToParcel(parcel, 0);
    return parcel.dataSize();
}