从睡眠模式恢复时保持GridView

4 回答

• 4

  尝试使用此标记：

  android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
  

  回复于 2024-05-03T11:26:17+08:00
• 1

  我注意到你的代码中有一件事：

  gridView.setLayoutParams(new GridView.LayoutParams(width,LayoutParams.FILL_PARENT, Gravity.CENTER_HORIZONTAL));
  

  即使 GridView 是 ViewGroup ，你也可以't access it' s LayoutParams . 只是认为它是低谷，如果这可能意味着你可以把 GridView 放在另一个 GridView .

  在进一步说明之前解决这个问题因为弄乱了你 .

  例如，如果您希望GridView位于LinearLayout内，请尝试以下操作：

  gridView.setLayoutParams(new LinearLayout.LayoutParams(width,LayoutParams.FILL_PARENT, Gravity.CENTER_HORIZONTAL));
  

  这是this answer的正确实现：

  public class MainActivity extends Activity {
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          /*You have to implement what things from the gridView sould be "saved"*/
          GridView gridView = new GridView(this) {
  
              @Override
              public Parcelable onSaveInstanceState() {
                  // Create the Parceable object with the things you want to save
                                  Parceable stateOfGrid = ....etc
                  return stateOfGrid;
              }
  
                          @Override
              public void onRestoreInstanceState(Parcelable state) {
                  // Restore your grid's parameters that you previously implemented in onSaveInstanceState
                  super.onRestoreInstanceState(state);
                                  ...
              }
  
          };
  
      }
  
      @Override
      protected void onRestoreInstanceState(Bundle savedInstanceState) {
          // TODO Auto-generated method stub
          super.onRestoreInstanceState(savedInstanceState);
  
                  if (savedInstanceState != null) {
                      Parcelable state = savedInstanceState.getParcelable("state");
                      if (state != null) {
                          gridView.onRestoreInstanceState(state);
                          Log.d(this.getClass().getName(), "state restored!");                
                      }
      }
  
      @Override
      protected void onSaveInstanceState(Bundle outState) {
          // Put your grid's Parceable into the bundle
          super.onSaveInstanceState(outState);
                  Parcelable state = gridView.onSaveInstanceState();
                  outState.putParcelable("state", state);
      }
  
  
  }
  

  回复于 2024-05-03T11:26:17+08:00
• 0

  您可以使用onSaveInstanceState (Bundle outState)来保存gridview的状态

  @Override
  protected void onSaveInstanceState(Bundle outState) {
      super.onSaveInstanceState(outState);
      Parcelable state = gridView.onSaveInstanceState();
      outState.putParcelable("state", state);
  }
  

  然后在onCreate中将适配器安装到grdiview之后添加此代码

  if (savedInstanceState != null) {
    Parcelable state = savedInstanceState.getParcelable("state");
    if (state != null) {
      gridView.onRestoreInstanceState(state);
      Log.d(this.getClass().getName(), "state restored!");                
    }
  }
  

  回复于 2024-05-03T11:26:17+08:00
• 2

  您的应用程序是否以横向模式运行？

  如果是，那么你应该考虑添加标签

  "android:configChanges="keyboard|keyboardHidden|orientation" 为您在Manifest.xml中的活动，这将阻止Android系统杀死您的活动并在您解锁屏幕时重新启动它 .

  回复于 2024-05-03T11:26:17+08:00