請在回答标準例程之前閱讀問題以列印Toast 🙂
我想在螢幕的左上角顯示自定義Toast.我使用此代碼建立Toast：
Toast mFixedToast = new Toast(getApplicationContext());
mFixedToast.setDuration(timeout);
mFixedToast.setView(myInflatedLayout);
mFixedToast.setGravity(Gravity.TOP|Gravity.FILL_HORIZONTAL, 0, 0);
mFixedToast.setMargins(0,0);
然而,在一些裝置中,例如三星Galaxy S4,吐司不是位于(0,0),而是具有40-50像素的邊緣.許多其他裝置按預期工作.
我很肯定WindowManager添加了邊距(Toast視圖作為TYPE_TOAST類型的視圖添加到WindowManager)
這是為什麼？可以修改嗎？請看下面的代碼,我已經将Toast.java克隆到我自己的類中,并隔離了将視圖添加到WM的行：
// LayoutParams for the TOAST view ... tried to change params.type but no luck.
final WindowManager.LayoutParams params = mParams;
params.height = WindowManager.LayoutParams.WRAP_CONTENT;
params.width = WindowManager.LayoutParams.WRAP_CONTENT;
params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
params.format = PixelFormat.TRANSLUCENT;
params.windowAnimations = android.R.style.Animation_Toast;
params.type = WindowManager.LayoutParams.TYPE_TOAST;
mWM = (WindowManager)mView.getContext().getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
mParams.gravity = gravity;
// CHECKED these all are 0 !!!
mParams.x = mX; mParams.y = mY;
mParams.verticalMargin = mVerticalMargin;
mParams.horizontalMargin = mHorizontalMargin;
.
.
if (localLOGV) Log.v(TAG, "ADD! " + mView + " in " + this+" with "+mX+","+mY+","+mVerticalMargin+","+mHorizontalMargin);
mWM.addView(mView, mParams);
是以看起來是WindowManager在這些裝置上添加這個邊距.看起來像一個安全區域或類似的東西,但我無法找到可以改變的地方(或者是否).
幫助贊賞.