Question

我有一个Activity类的xml使用另一个类caled＆＃34; helper＆＃34;，在帮助器中我通过发送TextView的上下文来控制Activty 1}} class。

问题是在帮助器中我使用线程来做某事，每次它都这样做我想改变textView的文本（它在循环中做了几次）。

堆栈跟踪错误：

03-12 18:30:55.533: E/AndroidRuntime(5317): FATAL EXCEPTION: Thread-183
03-12 18:30:55.533: E/AndroidRuntime(5317): android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4746)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:823)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.view.View.requestLayout(View.java:15473)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.view.View.requestLayout(View.java:15473)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.view.View.requestLayout(View.java:15473)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.view.View.requestLayout(View.java:15473)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.view.View.requestLayout(View.java:15473)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.view.View.requestLayout(View.java:15473)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.widget.TextView.checkForRelayout(TextView.java:6452)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.widget.TextView.setText(TextView.java:3696)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.widget.TextView.setText(TextView.java:3554)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at android.widget.TextView.setText(TextView.java:3529)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at com.example.snake.GameView.AllChecks(GameView.java:175)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at com.example.snake.GameView.run(GameView.java:129)
03-12 18:30:55.533: E/AndroidRuntime(5317):     at java.lang.Thread.run(Thread.java:856)

编辑：我特别错误的堆栈跟踪，我现在编辑它。虽然我通常得到我的答案，你不能从一个其他线程控制文本视图

Answer 1

每个视图都有一个post method，将在UI线程上调用。

textView.post(new Runnable() {
    @Override
    public void run() {
        textView.setText("something");
    }
});

但是你的问题就在其他地方，只要你有NullPointerException

从不同的线程控制TextView

1 个答案: