Android中button的onClick事件几种方法
Android中button的onClick事件几种方法
利用三种方法，学习button的监听事件。
方法一源码如下：
packagecom.example.androidtest;
importandroid.os.Bundle;
importandroid.app.Activity;
importandroid.content.Intent;
importandroid.view.Menu;
importandroid.widget.Button;
importandroid.widget.EditText;
importandroid.widget.Toast;
importandroid.view.View;
importandroid.widget.TextView;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
//importandroid.text.Editable;
//importandroid.text.TextWatcher;
importandroid.widget.EditText;
publicclassMainActivityextendsActivity
{
@Override
protectedvoidonCreate(BundlesavedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Buttonbutton1=(Button)findViewById(R.id.button1);
Buttonbutton2=(Button)findViewById(R.id.button2);
//方法一：
//增加事件响应
button1.setOnClickListener(newButton.OnClickListener()
{
publicvoidonClick(Viewv)
{
Intentintent=newIntent();
intent.setClass(MainActivity.this,TestActivity.class);
MainActivity.this.startActivity(intent);
}
});
button2.setOnClickListener(newButton.OnClickListener()
{
publicvoidonClick(Viewv)
{
Intentintent=newIntent();
intent.setClass(MainActivity.this,TActivity.class);
MainActivity.this.startActivity(intent);
}
});
}
方法二：
packagecom.example.androidtest;
importandroid.os.Bundle;
importandroid.app.Activity;
importandroid.content.Intent;
importandroid.view.Menu;
importandroid.widget.Button;
importandroid.widget.EditText;
importandroid.widget.Toast;
importandroid.view.View;
importandroid.widget.TextView;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
//importandroid.text.Editable;
//importandroid.text.TextWatcher;
importandroid.widget.EditText;
publicclassMainActivityextendsActivity
{
@Override
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Buttonbutton1=(Button)findViewById(R.id.button1);
Buttonbutton2=(Button)findViewById(R.id.button2);
}
//方法二：
publicvoidmyClickHandler(Viewtarget){
switch(target.getId()){
caseR.id.button1:
Intentmusic=newIntent();
music.setClass(MainActivity.this,TestActivity.class);
MainActivity.this.startActivity(music);
//setTitle("myClickHandler01");
break;
caseR.id.button2:
//setTitle("myClickHandler02");
Intentmoive=newIntent();
moive.setClass(MainActivity.this,TActivity.class);
MainActivity.this.startActivity(moive);
break;
}
}
}
方法三：
packagecom.example.androidtest;
importandroid.os.Bundle;
importandroid.app.Activity;
importandroid.content.Intent;
importandroid.view.Menu;
importandroid.widget.Button;
importandroid.widget.EditText;
importandroid.widget.Toast;
importandroid.view.View;
importandroid.widget.TextView;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
//importandroid.text.Editable;
//importandroid.text.TextWatcher;
importandroid.widget.EditText;
publicclassMainActivityextendsActivity
{
protectedvoidonCreate(BundlesavedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
//方法三：
publicvoidmyClickHandler01(Viewtarget){
//设置activity的头标题
//setTitle("myClickHandler01");
Intentmusic=newIntent();
music.setClass(MainActivity.this,TestActivity.class);
MainActivity.this.startActivity(music);
}
publicvoidmyClickHandler02(Viewtarget){
//设置activity的头标题
//setTitle("myClickHandler02");
Intentmoive=newIntent();
moive.setClass(MainActivity.this,TActivity.class);
MainActivity.this.startActivity(moive);
}
}
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