startActivityForResult的用法跟demo

2012-06-29

startActivityForResult的用法和demo有时候我们需要把A activity提交数据给B? activity处理，然后把结果返

startActivityForResult的用法和demo

有时候我们需要把A activity提交数据给B? activity处理，然后把结果返回给A

这种方式在很多种情况需要用到，比如我应用的程序需要有拍照上传的功能。

一种解决方案是? 我的应用程序?〉调用系统相机〉拍照〉关闭系统相机〉返回拍照后的照片到我的应用程序

startActivityForResult的用法跟demo

启动一个ForResult的意图：

Intent intent = new Intent(MainAcitvity.this,
??????RequestActivity.class);
????//发送意图标示为REQUSET=1
????startActivityForResult(intent, REQUSET);

B Activity处理数据：

Intent intent=new Intent();
????intent.putExtra(KEY_USER_ID, et01.getText().toString());
????intent.putExtra(KEY_USER_PASSWORD, et02.getText().toString());
setResult(RESULT_OK, intent);
?finish();

那么startActivityForResult如何使用呢：

package com.cn.activityresult.demo;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;public class MainAcitvity extends Activity {private Button btn01;private TextView tv01;public static final int REQUSET = 1;@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubsuper.onActivityResult(requestCode, resultCode, data);//requestCode标示请求的标示   resultCode表示有数据if (requestCode == MainAcitvity.REQUSET && resultCode == RESULT_OK) {String str = "账号"+ data.getStringExtra(RequestActivity.KEY_USER_ID) + "\n"+ "密码"+ data.getStringExtra(RequestActivity.KEY_USER_PASSWORD);tv01.setText(str);}Toast.makeText(this,"requestCode=" + requestCode + ":" + "resultCode=" + resultCode,Toast.LENGTH_LONG).show();}/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);btn01 = (Button) findViewById(R.id.btn01);tv01 = (TextView) findViewById(R.id.tv01);btn01.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent = new Intent(MainAcitvity.this,RequestActivity.class);//发送意图标示为REQUSET=1startActivityForResult(intent, REQUSET);}});}}

import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;public class RequestActivity extends Activity {private Button btn01;private EditText et01;private EditText et02;public static final String KEY_USER_ID="KEY_USER_ID";public static final String KEY_USER_PASSWORD="KEY_USER_PASSWORD";    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.request_activity);        btn01=(Button)findViewById(R.id.btn01);        et01=(EditText)findViewById(R.id.et01);        et02=(EditText)findViewById(R.id.et02);                        btn01.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent=new Intent();intent.putExtra(KEY_USER_ID, et01.getText().toString());intent.putExtra(KEY_USER_PASSWORD, et02.getText().toString());        setResult(RESULT_OK, intent);        finish();}});             }}

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startActivityForResult的用法跟demo