startActivityForResult 和 onActivityResult在activity间传递数据

AndroidManifest.xml

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <activity

            android:name=".KakuLogerActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity android:name=".LaunchActivity"

                  android:label="@string/app_name2" >

        </activity>

    </application>

主Activity：

public class KakuLogerActivity extends Activity {

    TextView phoneNumber;

    EditText iNameField;

    int REQUEST_CODE = 0;

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        Button launchBtn = (Button)findViewById(R.id.btnLaunchActivity);

        iNameField = (EditText)findViewById(R.id.inamefield);

        phoneNumber = (TextView)findViewById(R.id.phone_number);

        launchBtn.setOnClickListener(new OnClickListener(){

            @Override

            public void onClick(View v) {

                Intent newIntent = new Intent(KakuLogerActivity.this, LaunchActivity.class);

                // 传递参数

                newIntent.putExtra("name", iNameField.getText().toString());

                // 开始一个新的 Activity等候返回结果

                startActivityForResult(newIntent, REQUEST_CODE);

                Log.i("clicked", "open the LaunchActivity page!!!!");

            }

        });

    }

    @Override

    // 当结果返回后判断并执行操作

    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {

        super.onActivityResult(requestCode, resultCode, intent);

        if (requestCode == REQUEST_CODE) {

            if (resultCode == RESULT_OK) {

                Bundle extras = intent.getExtras();

                if (extras != null) {

                    phoneNumber.setText("Phone #: "

                            + extras.getString("phonenumber"));

                }

            }

        }

    }

}

LaunchActivity：

public class LaunchActivity extends Activity {

    EditText phoneNumber;

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.layout2);

        Button btn = (Button)findViewById(R.id.btnRtrnActivity);

        TextView oNameField = (TextView)findViewById(R.id.oNameMessege);

        phoneNumber = (EditText)findViewById(R.id.iTelephoneField);

        Log.i("launchActivity", "opened the LaunchActivity page!!!!");

        // 取得前一个画面的传入值

        Bundle extras = getIntent().getExtras();

        oNameField.setText("Hello " + extras.getString("name"));

        btn.setOnClickListener(new OnClickListener(){

            public void onClick(View v) {

                 // 设置返回数据

                Bundle bundle = new Bundle();

                bundle.putString("phonenumber", phoneNumber.getText().toString());

                Intent intent = new Intent();

                intent.putExtras(bundle);

                // 返回intent

                setResult(RESULT_OK, intent);

                finish();

            }

        });

    }

}