startActivityForResult的使用和用法
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();
}
});
}
}