startActivityForResult、setResult的用法
2015-04-23 23:58
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startActivityForResult和setRsult的具体作用: 第一个activity向第二个activity传递数据,第二个activity接受之后做一些处理,,,,然后A又要利用这些数据继续做一些操作,就是利用回传值。
第一个activity的代码:
public class MainActivity extends Activity implements OnClickListener {
private Button but;
private EditText edit;
private TextView text;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
but = (Button) findViewById(R.id.but);
edit = (EditText) findViewById(R.id.edit);
text = (TextView) findViewById(R.id.text);
but.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.but:
Intent main = new Intent(MainActivity.this, OneActivity.class);
main.putExtra("zhi", edit.getText().toString());
MainActivity.this.startActivityForResult(main, 2);
break;
default:
break;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == 10) {
String str = data.getExtras().getString("zhi") ;
text.setText("" + str);
}
}
}
第二个activity的代码:
public class OneActivity extends Activity implements OnClickListener {
private String str;
private Button but2 ;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.one);
but2 = (Button) findViewById(R.id.but2) ;
but2.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.but2:
Intent in = getIntent() ;
str = in.getStringExtra("zhi");
in.putExtra("str",str) ;
setResult(10, in);
finish();
break;
default:
break;
}
}
}
requestCode是请求码,resultCode是接受码,可以根据接受码区分是具有哪个操作发送到的请求,利用setResult返回数据,result返回数据的时候携带参数一起发送,
protected void onActivityResult(int requestCode, int resultCode, Intent data)中的data就是返回的数据,所有返回的数据都在这里面,完全可以在这里面取出。
本文出自 “清甘茶” 博客,请务必保留此出处http://shunshuncon.blog.51cto.com/8232441/1637764
第一个activity的代码:
public class MainActivity extends Activity implements OnClickListener {
private Button but;
private EditText edit;
private TextView text;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
but = (Button) findViewById(R.id.but);
edit = (EditText) findViewById(R.id.edit);
text = (TextView) findViewById(R.id.text);
but.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.but:
Intent main = new Intent(MainActivity.this, OneActivity.class);
main.putExtra("zhi", edit.getText().toString());
MainActivity.this.startActivityForResult(main, 2);
break;
default:
break;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == 10) {
String str = data.getExtras().getString("zhi") ;
text.setText("" + str);
}
}
}
第二个activity的代码:
public class OneActivity extends Activity implements OnClickListener {
private String str;
private Button but2 ;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.one);
but2 = (Button) findViewById(R.id.but2) ;
but2.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.but2:
Intent in = getIntent() ;
str = in.getStringExtra("zhi");
in.putExtra("str",str) ;
setResult(10, in);
finish();
break;
default:
break;
}
}
}
requestCode是请求码,resultCode是接受码,可以根据接受码区分是具有哪个操作发送到的请求,利用setResult返回数据,result返回数据的时候携带参数一起发送,
protected void onActivityResult(int requestCode, int resultCode, Intent data)中的data就是返回的数据,所有返回的数据都在这里面,完全可以在这里面取出。
本文出自 “清甘茶” 博客,请务必保留此出处http://shunshuncon.blog.51cto.com/8232441/1637764
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