android 自定义toast

toast 无未能自定义时间 且弹出的模式 是前面一个显示完再显示后面一个 在使用中会有不便。

以下代码解决以上两个问题：

package com.example.widget;import java.util.Timer;import java.util.TimerTask;import android.R.color;import android.app.Activity;import android.content.res.Resources;import android.graphics.PixelFormat;import android.os.Handler;import android.util.Log;import android.view.Gravity;import android.view.View;import android.view.View.OnClickListener;import android.view.WindowManager;import android.widget.TextView;/** * 只显示最后一个toast,不存在toast列表的问题<Br> * 可随意 设置显示 时间<Br> */public class MyToast {private final static Handler mHandler = new Handler();private static Activity mContext = null;private static TN mTN;/** toast显示时间 */private static int mdurationMillis;private static View mNextView;private static View mView;private static WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();private static WindowManager mWM = null;public MyToast(Activity context) {mContext = context;mTN = new TN();mWM = (WindowManager) context.getApplication().getSystemService(mContext.getApplication().WINDOW_SERVICE);initWmP();}/** * Show the view for the specified duration. */public void show() {printLog("show");if (mNextView == null) {throw new RuntimeException("setView must have been called");}mTN.show();}/** * Close the view if it's showing, or don't show it if it isn't showing yet. * You do not normally have to call this. Normally view will disappear on * its own after the appropriate duration. */public void cancel() {mTN.hide();// TODO this still needs to cancel the inflight notification if any}/** * Set the view to show. *  * @see #getView */public void setView(View view) {mNextView = view;}public void setOnClickListener(View.OnClickListener listener) {mNextView.setOnClickListener(listener);}/** * Return the view. *  * @see #setView */public View getView() {return mNextView;}/** * Set how long to show the view for. *  * @see #LENGTH_SHORT * @see #LENGTH_LONG */public void setDuration(int duration) {mdurationMillis = duration;}/** * Set the margins of the view. *  * @param horizontalMargin *            The horizontal margin, in percentage of the container width, *            between the container's edges and the notification * @param verticalMargin *            The vertical margin, in percentage of the container height, *            between the container's edges and the notification */public void setMargin(float horizontalMargin, float verticalMargin) {mParams.horizontalMargin = horizontalMargin;mParams.verticalMargin = verticalMargin;}/** * Set the location at which the notification should appear on the screen. *  * @see android.view.Gravity * @see #getGravity */public void setGravity(int gravity, int xOffset, int yOffset) {mParams.gravity = gravity;mParams.x = xOffset;mParams.y = yOffset;}/** * 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 durationMillis *            How long to display the message. Either {@link #LENGTH_SHORT} *            or {@link #LENGTH_LONG} *  */public static MyToast makeText(final Activity context, CharSequence text,int durationMillis) {printLog("makeText");MyToast result = new MyToast(context);TextView tv = new TextView(context);tv.setPadding(10, 20, 10, 20);tv.setBackgroundResource(color.darker_gray);tv.setText(text);mNextView = tv;mdurationMillis = durationMillis;return result;}private static void printLog(String str) {Log.d("MyToast", str);}/** * Make a standard toast that just contains a text view with the text from a * resource. *  * @param context *            The context to use. Usually your *            {@link android.app.Application} or *            {@link android.app.Activity} object. * @param resId *            The resource id of the string resource to use. Can be *            formatted text. * @param duration *            How long to display the message. Either {@link #LENGTH_SHORT} *            or {@link #LENGTH_LONG} *  * @throws Resources.NotFoundException *             if the resource can't be found. */public static MyToast makeText(Activity context, int resId, int duration)throws Resources.NotFoundException {return makeText(context, context.getResources().getText(resId),duration);}private static void initWmP() {final int gravity = Gravity.CENTER;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.height = WindowManager.LayoutParams.WRAP_CONTENT;mParams.width = WindowManager.LayoutParams.WRAP_CONTENT;mParams.horizontalMargin = 0f;mParams.verticalMargin = 0f;mParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;mParams.format = PixelFormat.TRANSLUCENT;mParams.type = WindowManager.LayoutParams.TYPE_PHONE;mParams.setTitle("Toast");mParams.x = 0;mParams.y = 0;}/** * Update the text in a Toast that was previously created using one of the * makeText() methods. *  * @param resId *            The new text for the Toast. */public void setText(int resId) {setText(mContext.getText(resId));}/** * Update the text in a Toast that was previously created using one of the * makeText() methods. *  * @param s *            The new text for the Toast. */public void setText(CharSequence s) {if (mNextView == null) {throw new RuntimeException("This Toast was not created with Toast.makeText()");}if (mNextView instanceof TextView) {((TextView) mNextView).setText(s);} else {throw new RuntimeException("This Toast was not created with Toast.makeText()");}}// =======================================================================================private static class TN {public TN() {}static Timer mNextViewTimer;static Timer mViewTimer;public void ShowView() {if (mView != mNextView) {ViewHide();printLog("mViewTimer ！=null--->"+(mViewTimer != null));if (mViewTimer != null) {printLog("mViewTimer cancle");mViewTimer.cancel();}}mWM.addView(mNextView, mParams);mNextViewTimer = new Timer();mNextViewTimer.schedule(new TimerTask() {@Overridepublic void run() {printLog("HideRunnable");mHandler.post(new HideRunnable());}}, mdurationMillis);mView = mNextView;mViewTimer = mNextViewTimer;printLog("mNextViewTimer ！=null--->"+(mNextViewTimer != null));printLog("mViewTimer 输值");printLog("mViewTimer ！=null--->"+(mViewTimer != null));};class HideRunnable implements Runnable {public void run() {printLog("handleHide");ViewHide();}};/** * schedule handleShow into the right thread */public void show() {ShowView();}/** * schedule handleHide into the right thread */public void hide() {ViewHide();}private void ViewHide() {if (mView != null) {if (mView.getParent() != null) {mWM.removeView(mView);}mView = null;}}}}