Android自定义Toast
转于:http://blog.****.net/zhangweiwtmdbf/article/details/30031015
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一、引言
在开发的过程中你会发现Android自身的Toast提示有许多限制,比如我想自定义Toast的动画、自定义一个美观的View显示在Toast中、更多的是让Toast显示指定的时长等等。
首先一下效果如何:
二、原理
自定义的原理也很简单,就是给WindowManager添加View和删除View,不过需要设置WindowManager.LayoutParams和View的样式,使其看起来和Android系统的Toast看起来很相像。
具体代码如下:
- /**
- * Custom Toast
- *
- * @author Lucky
- *
- */
- public class ToastHelper {
- public static final int LENGTH_LONG = 3500;
- public static final int LENGTH_SHORT = 2000;
- private WindowManager mWindowManager;
- private WindowManager.LayoutParams mWindowParams;
- private View toastView;
- private Context mContext;
- private Handler mHandler;
- private String mToastContent = "";
- private int duration = 0;
- private int animStyleId = android.R.style.Animation_Toast;
- private final Runnable timerRunnable = new Runnable() {
- @Override
- public void run() {
- removeView();
- }
- };
- private ToastHelper(Context context) {
- // Notice: we should get application context
- // otherwise we will get error
- // "Activity has leaked window that was originally added"
- Context ctx = context.getApplicationContext();
- if (ctx == null) {
- ctx = context;
- }
- this.mContext = ctx;
- mWindowManager = (WindowManager) mContext
- .getSystemService(Context.WINDOW_SERVICE);
- init();
- }
- private void init() {
- mWindowParams = new WindowManager.LayoutParams();
- mWindowParams.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
- | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
- | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
- mWindowParams.alpha = 1.0f;
- mWindowParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
- mWindowParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
- mWindowParams.gravity = Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM;
- mWindowParams.format = PixelFormat.TRANSLUCENT;
- mWindowParams.type = WindowManager.LayoutParams.TYPE_TOAST;
- mWindowParams.setTitle("ToastHelper");
- mWindowParams.packageName = mContext.getPackageName();
- mWindowParams.windowAnimations = animStyleId;// TODO
- mWindowParams.y = mContext.getResources().getDisplayMetrics().widthPixels / 5;
- }
- @SuppressWarnings("deprecation")
- @SuppressLint("NewApi")
- private View getDefaultToastView() {
- TextView view = new TextView(mContext);
- view.setText(mToastContent);
- view.setGravity(Gravity.CENTER_VERTICAL | Gravity.START);
- view.setFocusable(false);
- view.setClickable(false);
- view.setFocusableInTouchMode(false);
- view.setTextColor(android.graphics.Color.WHITE);
- Drawable drawable = mContext.getResources().getDrawable(
- android.R.drawable.toast_frame);
- if (Build.VERSION.SDK_INT < 16) {
- view.setBackgroundDrawable(drawable);
- } else {
- view.setBackground(drawable);
- }
- return view;
- }
- public void show() {
- removeView();
- if (toastView == null) {
- toastView = getDefaultToastView();
- }
- mWindowParams.gravity = android.support.v4.view.GravityCompat
- .getAbsoluteGravity(Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM,
- android.support.v4.view.ViewCompat
- .getLayoutDirection(toastView));
- removeView();
- mWindowManager.addView(toastView, mWindowParams);
- if (mHandler == null) {
- mHandler = new Handler();
- }
- mHandler.postDelayed(timerRunnable, duration);
- }
- public void removeView() {
- if (toastView != null && toastView.getParent() != null) {
- mWindowManager.removeView(toastView);
- mHandler.removeCallbacks(timerRunnable);
- }
- }
- /**
- * @param context
- * @param content
- * @param duration
- * @return
- */
- public static ToastHelper makeText(Context context, String content,
- int duration) {
- ToastHelper helper = new ToastHelper(context);
- helper.setDuration(duration);
- helper.setContent(content);
- return helper;
- }
- /**
- * @param context
- * @param strId
- * @param duration
- * @return
- */
- public static ToastHelper makeText(Context context, int strId, int duration) {
- ToastHelper helper = new ToastHelper(context);
- helper.setDuration(duration);
- helper.setContent(context.getString(strId));
- return helper;
- }
- public ToastHelper setContent(String content) {
- this.mToastContent = content;
- return this;
- }
- public ToastHelper setDuration(int duration) {
- this.duration = duration;
- return this;
- }
- public ToastHelper setAnimation(int animStyleId) {
- this.animStyleId = animStyleId;
- mWindowParams.windowAnimations = this.animStyleId;
- return this;
- }
- /**
- * custom view
- *
- * @param view
- */
- public ToastHelper setView(View view) {
- this.toastView = view;
- return this;
- }
- }
另外分享一个自定义的Anim:
1.显示Toast的动画:
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:duration="300"
- android:fillAfter="true" >
- <alpha
- android:fromAlpha="0.0"
- android:toAlpha="1.0" />
- <translate
- android:fromYDelta="20%"
- android:toYDelta="0%" />
- <scale
- android:fromXScale="0.5"
- android:fromYScale="0.5"
- android:pivotX="50%"
- android:pivotY="50%"
- android:toXScale="1.0"
- android:toYScale="1.0" />
- </set>
2.退出Toast的动画:
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:duration="300"
- android:fillAfter="true" >
- <alpha
- android:fromAlpha="1.0"
- android:toAlpha="0.0" />
- <translate
- android:fromYDelta="0%"
- android:toYDelta="20%" />
- </set>
给WIndowManager中的View添加动画需要定义一个style,如下:
- <style name="PopToast">
- <item name="@android:windowEnterAnimation">@anim/anim_toast_enter</item>
- <item name="@android:windowExitAnimation">@anim/anim_toast_exit</item>
- </style>
最后可以按照如下的方式去使用:
- ToastHelper
- .makeText(this, "hello world 你好,哈拉雷速度发说得对",
- ToastHelper.LENGTH_SHORT)
- .setAnimation(R.style.PopToast).show();
三、参考资料:
SuperToast: https://github.com/JohnPersano/SuperToasts