只有创建视图层次结构的原始线程才能接触其视图 [英] Only the original thread that created a view hierarchy can touch its views
问题描述
我正在尝试让 ImageView 在我的可绘制文件夹中的 2 个图像之间进行动画处理.
I'm trying to get an ImageView to animate between 2 images in my drawable folder.
我以为一切都会好起来的,但日志显示错误:只有创建视图层次结构的原始线程才能接触其视图.
I thought everything would work fine, but the log is showing an error: Only the original thread that created a view hierarchy can touch its views.
这是我的代码:
public class ExerciseActivity extends Activity {
private ExercisesDataSource datasource;
private Cursor cursor;
private ImageView image_1_view;
private Timer _timer;
private int _index;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_exercise);
datasource = new ExercisesDataSource(this);
datasource.open();
cursor = datasource.fetchExercise(exerciseDataID);
image_1_view = (ImageView) findViewById(R.id.exercise_image);
_index = 1;
_timer = new Timer();
_timer.schedule(new TickClass(), 1000);
}
public class TickClass extends TimerTask
{
private int columnIndex;
@Override
public void run() {
if (_index == 1) {
columnIndex = cursor.getColumnIndex(MySQLiteHelper.COLUMN_IMAGE_1);
_index = 2;
}
else {
columnIndex = cursor.getColumnIndex(MySQLiteHelper.COLUMN_IMAGE_2);
_index = 1;
}
String image_1 = cursor.getString(columnIndex);
image_1 = image_1.replace(".png", "");
int resourceId = getResources().getIdentifier(getPackageName() + ":drawable/" + image_1, null, null);
image_1_view.setImageDrawable(getResources().getDrawable(resourceId));
}
}
}
我继续将类和函数设置为公开,但这并没有解决问题.
I went ahead and set the classes and functions to public but that did not fix it.
所有资源和一切都很好,我该如何解决这个错误?
All of the resources and everything are fine, how do I fix this error?
推荐答案
TickClass
中的代码在另一个线程上运行.要从这里进行 UI 工作,请使用 runOnUiThread
.有关详细信息,请参阅 文档.
Your code in TickClass
runs on another thread. To do UI work from here use runOnUiThread
.
See the docu for details.
runOnUiThread(new Runnable() {
public void run() {
image_1_view.setImageDrawable(getResources().getDrawable(resourceId));
}
});
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