主页：
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public
class
MainActivity
extends
Activity
{
/**
* 主页点击按钮跳转到第二页
* 第二页点击按钮1将字符串内容显示到主页，点击按钮2将数字内容显示到主页
*/
private
final
static
int
RESULT_CODE_ONE =
1
;
private
final
static
int
RESULT_CODE_TWO =
2
;
@Override
protected
void
onActivityResult(
int
requestCode,
int
resultCode, Intent data)
{
super
.onActivityResult(requestCode, resultCode, data);
TextView textView = (TextView) findViewById(R.id.textView1_main);
String text =
null
;
switch
(resultCode)
//判断返回码
{
case
RESULT_CODE_ONE:
text =
"from按钮1:"
+ data.getStringExtra(
"btnone"
);
break
;
case
RESULT_CODE_TWO:
int
age = data.getIntExtra(
"btntwo"
,
0
);
//0为默认值，当data没有接收到返回的int时，返回这个默认值
text =
"from按钮2:"
+ String.valueOf(age);
break
;
default
:
break
;
}
textView.setText(text);
}
@Override
protected
void
onCreate(Bundle savedInstanceState)
{
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.button1_main).setOnClickListener(
new
OnClickListener()
{
@Override
public
void
onClick(View v)
{
Intent intent =
new
Intent(MainActivity.
this
, SecondActivity.
class
);
startActivityForResult(intent ,
0
);
}
});
}
@Override
public
boolean
onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
return
true
;
}
}
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第二页
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public
class
SecondActivity
extends
Activity
{
private
final
static
int
RESULT_CODE_ONE =
1
;
private
final
static
int
RESULT_CODE_TWO =
2
;
@Override
protected
void
onCreate(Bundle savedInstanceState)
{
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
final
Intent data =
new
Intent();
findViewById(R.id.button1).setOnClickListener(
new
OnClickListener()
{
@Override
public
void
onClick(View v)
{
data.putExtra(
"btnone"
,
"name"
);
setResult(RESULT_CODE_ONE, data );
//设置返回码
finish();
}
});
findViewById(R.id.button2).setOnClickListener(
new
OnClickListener()
{
@Override
public
void
onClick(View v)
{
data.putExtra(
"btntwo"
,
12
);
setResult(RESULT_CODE_TWO, data );
//设置返回码
finish();
}
});
}
@Override
public
boolean
onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.second, menu);
return
true
;
}
}
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第二页按钮事件重构过程一：
1.实现OnClickListener接口
2.重写onClick(View v)
3.findViewById(R.id.button1).setOnClickListener(this)
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public
class
SecondActivity
extends
Activity
implements
OnClickListener
//实现监听者接口
{
private
final
static
int
RESULT_CODE_ONE =
1
;
private
final
static
int
RESULT_CODE_TWO =
2
;
@Override
public
void
onClick(View v)
//重写点击方法
{
Intent data =
new
Intent();
if
(v.getId() == R.id.button1)
//判断view的id
{
data.putExtra(
"btnone"
,
"name"
);
setResult(RESULT_CODE_ONE, data );
finish();
}
if
(v.getId() == R.id.button2)
{
data.putExtra(
"btntwo"
,
12
);
setResult(RESULT_CODE_TWO, data );
finish();
}
}
@Override
protected
void
onCreate(Bundle savedInstanceState)
{
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
findViewById(R.id.button1).setOnClickListener(
this
);
//监听按钮
findViewById(R.id.button2).setOnClickListener(
this
);
}
@Override
public
boolean
onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.second, menu);
return
true
;
}
}
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第二页按钮事件重构过程二：将事件内容以方法代替
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public
class
SecondActivity
extends
Activity
implements
OnClickListener
//实现监听者接口
{
private
final
static
int
RESULT_CODE_ONE =
1
;
private
final
static
int
RESULT_CODE_TWO =
2
;
@Override
public
void
onClick(View v)
//重写点击方法
{
Intent data =
new
Intent();
if
(v.getId() == R.id.button1)
//判断view的id
{
// data.putExtra("btnone", "name");
// setResult(RESULT_CODE_ONE, data );
// finish();
sendResult(
"btnone"
,
"name"
, RESULT_CODE_ONE);
}
if
(v.getId() == R.id.button2)
{
// data.putExtra("btntwo", 12);
// setResult(RESULT_CODE_TWO, data );
// finish();
sendResult(
"btntwo"
, Integer.valueOf(
12
), RESULT_CODE_TWO);
}
}
private
void
sendResult(String extraKey, Object content,
int
resultCode)
{
Intent data =
new
Intent();
if
(content
instanceof
String)
{
data.putExtra(extraKey, (String) content);
}
else
if
(content
instanceof
Integer)
{
data.putExtra(extraKey, (Integer) content);
}
setResult(resultCode, data);
finish();
}
@Override
protected
void
onCreate(Bundle savedInstanceState)
{
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
findViewById(R.id.button1).setOnClickListener(
this
);
//监听按钮
findViewById(R.id.button2).setOnClickListener(
this
);
}
@Override
public
boolean
onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.second, menu);
return
true
;
}
}
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本文转自 glblong 51CTO博客，原文链接：http://blog.51cto.com/glblong/1198584，如需转载请自行联系原作者
