StartActivityForResult&onActivityResult 示例

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; @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { // TODO Auto-generated method stub super.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. */ @Override public 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() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent intent = new Intent(MainAcitvity.this, RequestActivity.class); //发送意图标示为REQUSET=1 startActivityForResult(intent, REQUSET); } }); } }