public class ToastUtils {    private Toast mToast = null;    private Context mContext;    private static volatile ToastUtils instance;    private ToastHandler toastHandler;    private final int SHOW_TOAST=0;    private ToastUtils(Context context){        this.mContext=context;        toastHandler=new ToastHandler();    }    public static ToastUtils getInstance(Context context) {        if (instance == null){            synchronized (ToastUtils.class){                if (instance == null){                    instance = new ToastUtils(context);                }            }        }        return instance;    }    private void show(String str) {        if (mToast == null) {// 防止多个toast重复显示            mToast = Toast.makeText(mContext, str, Toast.LENGTH_SHORT);        } else {            mToast.setText(str);        }        mToast.show();    }    public void showToast(String str){        Message msg=new Message();        Bundle b=new Bundle();        b.putString("str",str);        msg.setData(b);        toastHandler.sendMessage(msg);    }    private class ToastHandler extends Handler {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            Bundle b=msg.getData();            switch (msg.what){                case SHOW_TOAST:                    show(b.getString("str"));                    break;                default:                    break;            }        }    }    private void log(String str) {        android.util.Log.i("chenxi", str + " @"+getClass().getSimpleName());    }}

将Toast.Show()放在Handler中可以避免频繁显示toast显示时出现的异常

Only the original thread that created a view hierarchy can touch its views

Android(安卓)Toast优化

Only the original thread that created a view hierarchy can touch its views

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