标签：
private void scheduleTimeoutLocked(ToastRecord r)
{
mHandler.removeCallbacksAndMessages(r);
Message m = Message.obtain(mHandler, MESSAGE_TIMEOUT, r);
long delay = r.duration == Toast.LENGTH_LONG ? LONG_DELAY : SHORT_DELAY;
mHandler.sendMessageDelayed(m, delay);
} 之前Toast源码里也讲过，为什么Toast的桌面显示时间只能是2s和3.5s，关键就是在于long delay变量的延迟时间只能是2s和3.5s。因此，如果你是Android操作系统的开发人员，你可以直接修改Android Framework层的NotificationManagerService类代码，将LONG_DELAY和SHORT_DELAY改成你想要的时间间隔。但是，这种做法的弊端很明显。首先，你可能只是一个小小的应用层开发工程师，只能改动应用层代码。其次，就算修改NotificationManagerService，也只能改动LONG_DELAY和SHORT_DELAY两个变量，无法做到随意修改显示时间。import android.content.Context;
import android.graphics.PixelFormat;
import android.os.Handler;
import android.os.Message;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager;
import android.widget.Toast;
public class ToastCustom {
private static final int MESSAGE_TIMEOUT = 2;
private WindowManager wdm;
private double time;
private View mView;
private WindowManager.LayoutParams params;
private WorkerHandler mHandler;
private ToastCustom(Context context, String text, double time) {
wdm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
mHandler = new WorkerHandler();
Toast toast = Toast.makeText(context, text, Toast.LENGTH_LONG);
mView = toast.getView();
params = new WindowManager.LayoutParams();
params.height = WindowManager.LayoutParams.WRAP_CONTENT;
params.width = WindowManager.LayoutParams.WRAP_CONTENT;
params.format = PixelFormat.TRANSLUCENT;
params.windowAnimations = toast.getView().getAnimation().INFINITE;
params.type = WindowManager.LayoutParams.TYPE_TOAST;
params.setTitle("Toast");
params.gravity = Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL;
params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
this.time = time;
}
public static ToastCustom makeText(Context context, String text, double time) {
ToastCustom toastCustom = new ToastCustom(context, text, time);
return toastCustom;
}
public void show() {
wdm.addView(mView, params);
mHandler.sendEmptyMessageDelayed(MESSAGE_TIMEOUT, (long) (time * 1000));
}
public void cancel() {
wdm.removeView(mView);
}
private class WorkerHandler extends Handler {
@Override
public void handleMessage(Message msg)
{
switch (msg.what)
{
case MESSAGE_TIMEOUT:
cancel();
break;
}
}
}
} <style name="custom_toast_anim_view">
<item name="@android:windowEnterAnimation">@anim/enter_anim</item>
<item name="@android:windowExitAnimation">@anim/exit_anim</item>
</style> 然后在anim文件夹下面增加两个动画效果文件，分别为enter_anim.xml和exit_anim.xml。<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="1"
android:fromXDelta="0"
android:fromYDelta="0"
android:toXDelta="0"
android:toYDelta="80" />
<translate
android:fromXDelta="0"
android:fromYDelta="0"
android:toXDelta="0"
android:toYDelta="-100"
android:duration="300"
android:fillAfter="true"
android:interpolator="@android:anim/decelerate_interpolator"/>
<alpha
android:duration="100"
android:fromAlpha="0"
android:toAlpha="1" />
<translate
android:duration="80"
android:fillAfter="true"
android:fromXDelta="0"
android:fromYDelta="0"
android:startOffset="300"
android:toXDelta="0"
android:toYDelta="20" />
</set> exit_anim.xml：<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<alpha
android:duration="800"
android:fromAlpha="1"
android:toAlpha="0" />
</set> 然后，修改一下自定义Toast代码中的params.windowAnimations变量即可：params.windowAnimations = com.example.photocrop.R.style.custom_toast_anim_view;
标签：
原文地址：http://blog.csdn.net/wzy_1988/article/details/43412875
