Android Toast自定义显示时间

package com.dls.nltest;
 
import android.content.Context;
import android.os.Handler;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Gravity;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.LinearLayout.LayoutParams;
 
public class GenericToast{
 private static final String TAG = "GenericToast";
 
 private static final int TOAST_TEXTSIZE = 20;
 
 /** {@link Toast#LENGTH_SHORT} default time is 3500ms */
 private static final int LENGTH_SHORT_TIME = 2000;
 
 private static Context mContext = null;
 
 private static Toast mToast = null;
 private static TextView mTextView = null;
 private static int mDuration = 0;
 private static CharSequence mText = null;
 
 private Handler mHandler = new Handler();
 
 private GenericToast(Context context) {
 mContext = context;
 }
 
 public static GenericToast makeText(Context context, CharSequence text, int duration){
 GenericToast instance = new GenericToast(context);
 mContext = context;
 mDuration = duration;
 mText = text;
 return instance;
 }
 
 private static void getToast(Context context, CharSequence text){
 mToast = Toast.makeText(context, null, Toast.LENGTH_LONG);
 mToast.setGravity(Gravity.CENTER, 0, 0);
 LinearLayout toastView = (LinearLayout)mToast.getView();
 
 // Get the screen size with unit pixels.
 WindowManager wm = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
 DisplayMetrics outMetrics = new DisplayMetrics();
 wm.getDefaultDisplay().getMetrics(outMetrics);
 
 mTextView = new TextView(context);
 LayoutParams vlp = new LayoutParams(outMetrics.widthPixels,
        outMetrics.heightPixels); 
 vlp.setMargins(0, 0, 0, 0);
 mTextView.setLayoutParams(vlp);
 mTextView.setTextSize(TOAST_TEXTSIZE);
 mTextView.setText(text);
 mTextView.setGravity(Gravity.CENTER);
 toastView.addView(mTextView);
 }
 
 /**
 * Before call this method, you should call {@link makeText}.
 *
 * @return Toast display duration.
 */
 public int getDuration(){
 return mDuration;
 }
 
 public void show(){
 Log.d(TAG, "Show custom toast");
 mHandler.post(showRunnable);
 }
 
 public void hide(){
 Log.d(TAG, "Hide custom toast");
 mDuration = 0;
 if(mToast != null){
 mToast.cancel();
 }
 }
 
 private Runnable showRunnable = new Runnable(){
 @Override
 public void run() {
 if(mToast != null){
 mTextView.setText(mText);
 }else{
 getToast(mContext, mText);
 }
 if(mDuration != 0){
 mToast.show();
 }else{
 Log.d(TAG, "Hide custom toast in runnable");
 hide();
 return;
 }
 
 if(mDuration > LENGTH_SHORT_TIME){
 mHandler.postDelayed(showRunnable, LENGTH_SHORT_TIME);
 mDuration -= LENGTH_SHORT_TIME;
 }else{
 mHandler.postDelayed(showRunnable, mDuration);
 mDuration = 0;
 }
 }
 };
}

GenericToast mGToast = GenericToast.makeText(this, "I am generic toast", 10 * 1000);
mGToast.show();