package com.ittianyu.mobileguard.view;
import android.content.Context;
import android.graphics.PixelFormat;
import android.graphics.Point;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import com.ittianyu.mobileguard.constant.Constant;
import com.ittianyu.mobileguard.utils.ConfigUtils;
/**
* Created by yu.
* Like a Toast, show in front of window and can be dragged.
* You can put any view in it.
*/
public class FloatToast {
private WindowManager mWM;
private View mView;
private View mNextView;
private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();
private float startX, startY;
/**
* Construct an empty FloatToast object.
*/
private FloatToast(Context context) {
// XXX This should be changed to use a Dialog, with a Theme.Toast
// defined that sets up the layout params appropriately.
final WindowManager.LayoutParams params = mParams;
params.height = WindowManager.LayoutParams.WRAP_CONTENT;
params.width = WindowManager.LayoutParams.WRAP_CONTENT;
params.format = PixelFormat.TRANSLUCENT;
// params.type = WindowManager.LayoutParams.TYPE_TOAST;
params.type = WindowManager.LayoutParams.TYPE_PRIORITY_PHONE;
params.setTitle("Toast");
params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
// set gravity
mParams.gravity = Gravity.LEFT | Gravity.TOP;
}
/**
* Make a standard toast that contains a custom view.
* @param context
* @param view
* @return
*/
public static FloatToast makeView(final Context context, View view) {
final FloatToast toast = new FloatToast(context);
// record view
toast.mNextView = view;
// set touch listener. Implement drag effect
view.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: {
// if action down, record the press position
toast.startX = event.getRawX();
toast.startY = event.getRawY();
break;
}
case MotionEvent.ACTION_MOVE: {
// move , record current position
float endX = event.getRawX();
float endY = event.getRawY();
// move toast
toast.mParams.x += (int)(endX - toast.startX);
toast.mParams.y += (int)(endY - toast.startY);
// update start position
toast.startX = endX;
toast.startY = endY;
// update view
toast.mWM.updateViewLayout(toast.mView, toast.mParams);
break;
}
case MotionEvent.ACTION_UP: {
// get screen size
Point point = new Point();
toast.mWM.getDefaultDisplay().getSize(point);
// prevent toast.mParams.x y beyond the screen
if(toast.mParams.x < 0) {
toast.mParams.x = 0;
} else if (toast.mParams.x + toast.mView.getWidth() > point.x) {
toast.mParams.x = point.x - toast.mView.getWidth();
}
if(toast.mParams.y < 0) {
toast.mParams.y = 0;
} else if (toast.mParams.y + toast.mView.getHeight() > point.y) {
toast.mParams.y = point.y - toast.mView.getHeight();
}
// record x y
ConfigUtils.putInt(context, Constant.KEY_FLOAT_TOAST_X, toast.mParams.x);
ConfigUtils.putInt(context, Constant.KEY_FLOAT_TOAST_Y, toast.mParams.y);
break;
}
}
return true;
}
});
return toast;
}
/**
* you can use this method to get the view to change content
* @return the view which was set on makeView
*/
public View getView() {
return mNextView;
}
/**
* Show the view in front of screen at last position until call close()
* If the first show, it will show in center of screen.
* You also can call show(x, y) to specific position.
*/
public void show() {
if (mView != mNextView) {
// remove the old view if necessary
close();
mView = mNextView;
Context context = mView.getContext().getApplicationContext();
if (context == null) {
context = mView.getContext();
}
mWM = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
if (mView.getParent() != null) {
mWM.removeView(mView);
}
// get device width and height
Point point = new Point();
mWM.getDefaultDisplay().getSize(point);
// get config x,y
mParams.x = ConfigUtils.getInt(context, Constant.KEY_FLOAT_TOAST_X, (point.x - mView.getWidth()) / 2);
mParams.y = ConfigUtils.getInt(context, Constant.KEY_FLOAT_TOAST_Y, (point.y - mView.getHeight()) / 2);
// System.out.println("config (x, y) = " + mParams.x + "," + mParams.y);
mWM.addView(mView, mParams);
}
}
/**
* Show the view in front of screen at position x,y until call close()
* @param x the position x of view
* @param y the position y of view
*/
public void show(int x, int y) {
mParams.x = x;
mParams.y = y;
if (mView != mNextView) {
// remove the old view if necessary
close();
mView = mNextView;
Context context = mView.getContext().getApplicationContext();
if (context == null) {
context = mView.getContext();
}
mWM = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
if (mView.getParent() != null) {
mWM.removeView(mView);
}
mWM.addView(mView, mParams);
}
}
/**
* hide the float toast and release resources
*/
public void close() {
if (mView != null) {
// note: checking parent() just to make sure the view has
// been added... i have seen cases where we get here when
// the view isn't yet added, so let's try not to crash.
if (mView.getParent() != null) {
mWM.removeView(mView);
}
mView = null;
}
}
}
/*
* Make a standard toast that just contains a text view.
*
* @param context The context to use. Usually your {@link android.app.Application}
* or {@link android.app.Activity} object.
* @param text The text to show. Can be formatted text.
* @param duration How long to display the message. Either {@link #LENGTH_SHORT} or
* {@link #LENGTH_LONG}
public static Toast makeText(Context context, CharSequence text, @Duration int duration) {
Toast result = new Toast(context);
LayoutInflater inflate = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = inflate.inflate(com.android.internal.R.layout.transient_notification, null);
TextView tv = (TextView)v.findViewById(com.android.internal.R.id.message);
tv.setText(text);
result.mNextView = v;
result.mDuration = duration;
return result;
}
* Show the view for the specified duration.
public void show() {
if (mNextView == null) {
throw new RuntimeException("setView must have been called");
}
INotificationManager service = getService();
String pkg = mContext.getOpPackageName();
TN tn = mTN;
tn.mNextView = mNextView;
try {
service.enqueueToast(pkg, tn, mDuration);
} catch (RemoteException e) {
// Empty
}
}
// TN 类继承了ITransientNotification.Stub，说明这个类提供了显示Toast的方法。
// TN类主要的代码
private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();
final Handler mHandler = new Handler();
WindowManager mWM;
TN() {
// XXX This should be changed to use a Dialog, with a Theme.Toast
// defined that sets up the layout params appropriately.
final WindowManager.LayoutParams params = mParams;
params.height = WindowManager.LayoutParams.WRAP_CONTENT;
params.width = WindowManager.LayoutParams.WRAP_CONTENT;
params.format = PixelFormat.TRANSLUCENT;
params.windowAnimations = com.android.internal.R.style.Animation_Toast;
params.type = WindowManager.LayoutParams.TYPE_TOAST;
params.setTitle("Toast");
params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
}
public void handleShow() {
if (localLOGV) Log.v(TAG, "HANDLE SHOW: " + this + " mView=" + mView
+ " mNextView=" + mNextView);
if (mView != mNextView) {
// remove the old view if necessary
handleHide();
mView = mNextView;
Context context = mView.getContext().getApplicationContext();
String packageName = mView.getContext().getOpPackageName();
if (context == null) {
context = mView.getContext();
}
mWM = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
// We can resolve the Gravity here by using the Locale for getting
// the layout direction
final Configuration config = mView.getContext().getResources().getConfiguration();
final int gravity = Gravity.getAbsoluteGravity(mGravity, config.getLayoutDirection());
mParams.gravity = gravity;
if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.FILL_HORIZONTAL) {
mParams.horizontalWeight = 1.0f;
}
if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.FILL_VERTICAL) {
mParams.verticalWeight = 1.0f;
}
mParams.x = mX;
mParams.y = mY;
mParams.verticalMargin = mVerticalMargin;
mParams.horizontalMargin = mHorizontalMargin;
mParams.packageName = packageName;
if (mView.getParent() != null) {
if (localLOGV) Log.v(TAG, "REMOVE! " + mView + " in " + this);
mWM.removeView(mView);
}
if (localLOGV) Log.v(TAG, "ADD! " + mView + " in " + this);
mWM.addView(mView, mParams);
trySendAccessibilityEvent();
}
}
public void handleHide() {
if (localLOGV) Log.v(TAG, "HANDLE HIDE: " + this + " mView=" + mView);
if (mView != null) {
// note: checking parent() just to make sure the view has
// been added... i have seen cases where we get here when
// the view isn't yet added, so let's try not to crash.
if (mView.getParent() != null) {
if (localLOGV) Log.v(TAG, "REMOVE! " + mView + " in " + this);
mWM.removeView(mView);
}
mView = null;
}
}
* schedule handleShow into the right thread
@Override
public void show() {
if (localLOGV) Log.v(TAG, "SHOW: " + this);
mHandler.post(mShow);
}
* schedule handleHide into the right thread
@Override
public void hide() {
if (localLOGV) Log.v(TAG, "HIDE: " + this);
mHandler.post(mHide);
}
*/