本來是測試自定義Toast，發現

 implements View.OnClickListener的Onclick事件怎麼都不響應，開始以為是自定義的問題。結果當然不是；需要clean專案就好了，AndroidStudio的問題還是很多~

    @Override
    public void onBackPressed() {
        ToastUtils.cancelToast();
        super.onBackPressed();
    }

PS：只是一個思路，其實覺得用不上。預設的只有兩種時間，退出app的時間間隔已經結束了

<pre name="code" class="java"><span style="color:#ffffff;">沒找</span>

public class MainActivity extends AppCompatActivity implements View.OnClickListener, OnTouchListener {
    Handler myHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
                case 0x111:
//                    Toast.makeText(MainActivity.this, "11", Toast.LENGTH_SHORT).show();
//                    methodlow();
                    break;
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button viewById = (Button) findViewById(R.id.bt_toast);
        Button button = (Button) findViewById(R.id.button);
        viewById.setOnClickListener(MainActivity.this);
        button.setOnClickListener(this);
 

</pre><pre name="code" class="java">    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.bt_toast:
//                Toast.makeText(MainActivity.this, "bt_toast", Toast.LENGTH_SHORT).show();
                ToastUtils.showToast(MainActivity.this, "點選測試");
                break;
            case R.id.button:
                ToastUtils.showToast(MainActivity.this, "buttonclick");


                break;
        }
    }
 

package com.tianch.test40.util;

import android.content.Context;
import android.widget.Toast;

/**
 * Created by Administrator on 2016/7/28.10
 */
public class ToastUtils {

    private static Toast toast;

    public static void showToast(Context context,
                                 String content) {
        if (toast == null) {
            toast = Toast.makeText(context,
                    content,
                    Toast.LENGTH_SHORT);
        } else {
            toast.setText(content);
        }
        toast.show();
    }

    public static void cancelToast() {
        if (toast != null) {
            toast.cancel();
        }
    }


}