只有创建视图层次结构的原始线程才能触及其视图

Question

我正在尝试让ImageView在我的drawable文件夹中的2个图像之间进行动画处理.

我认为一切都会正常,但日志显示错误: Only the original thread that created a view hierarchy can touch its views.

继承我的代码:

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));
        }
    }
}

我继续将类和功能设置为公开,但是没有解决它.

所有的资源和一切都很好,我该如何解决这个错误？

Answer 1

您的代码在TickClass另一个线程上运行.要从这里做UI工作使用runOnUiThread.有关详细信息,请参阅文档

runOnUiThread(new Runnable() {
    public void run() {
        image_1_view.setImageDrawable(getResources().getDrawable(resourceId));
    }
});