android 自定义组件获取onactivityresult值
时间: 2023-10-18 19:16:11 浏览: 42
要在自定义组件中获取 `onActivityResult` 的返回值,可以使用以下步骤:
1. 在自定义组件所在的 `Activity` 中重写 `onActivityResult` 方法,将返回值保存在变量中。
```java
public class MainActivity extends AppCompatActivity {
private int mResultCode;
private Intent mData;
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == YOUR_REQUEST_CODE) {
mResultCode = resultCode;
mData = data;
}
}
}
```
2. 在自定义组件中定义一个带有返回值的方法,该方法用于获取 `onActivityResult` 的返回值。
```java
public class MyCustomView extends View {
private int mResultCode;
private Intent mData;
public void startForResult(Activity activity, int requestCode) {
Intent intent = new Intent(activity, YourTargetActivity.class);
activity.startActivityForResult(intent, requestCode);
}
public void onActivityResult(int resultCode, Intent data) {
mResultCode = resultCode;
mData = data;
}
//...
}
```
3. 在 `onActivityResult` 方法中调用自定义组件的 `onActivityResult` 方法,将返回值传递给自定义组件。
```java
public class MainActivity extends AppCompatActivity {
private MyCustomView mCustomView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mCustomView = findViewById(R.id.custom_view);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
mCustomView.onActivityResult(resultCode, data);
}
}
```
这样,当从 `YourTargetActivity` 返回时,自定义组件中的 `mResultCode` 和 `mData` 就会被赋值。