OnLongClickListener接口接入

这里面的代码都是很简单的，所以在这里就简单的说一下

在string.xml中加入如下代码：

<?xml version="1.0" encoding="utf-8"?>
<resources>


    <string name="app_name">OnLongClickListener</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>
    <string name="textView">请您长按下面的按钮</string>
    <string name="button">请长时间按我</string>


</resources>

其main.xml代码：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.onlongclicklistener.MainActivity" >


    <TextView
        android:id="@+id/textView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/textView"
        android:textSize="20px"
        android:gravity="center" />


    <Button
        android:id="@+id/button"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView"
        android:layout_below="@+id/textView"
        android:text="@string/button" />


</RelativeLayout>

MainActivity代码如下：

package com.example.onlongclicklistener;


import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnLongClickListener;
import android.widget.Button;
import android.widget.Toast;




public class MainActivity extends Activity implements OnLongClickListener{

Button button;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button=(Button)findViewById(R.id.button);
        button.setTextSize(20);
        button.setOnLongClickListener(this);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


@Override
public boolean onLongClick(View arg0) {
if(arg0==button){
Toast.makeText(this, "长时间按下了按钮", Toast.LENGTH_SHORT).show();
}
return false;
}
}