私はまだ初心者なので、ばかげた質問をすることを許してください
ビュー階層を作成した元のスレッドだけがそのビューに触れることができるという意味がわかりません。
誰かがこのエラーが発生している理由とこの問題を解決する方法を教えてもらえますか?
ありがとうございました
これは私のクラスです
public class MainActivity extends Activity {
TextView title;
Random random = new Random();
int counter = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.startup);
startingUp();
}
private void startingUp() {
Thread timer = new Thread() { //new thread
public void run() {
Boolean b = true;
try {
do {
counter++;
title();
sleep(1000);
title.clearComposingText();
}
while (b == true);
} catch (IntruptedException e) {
e.printStackTrace();
}
finally {
}
};
};
timer.start();
}
public void title() {
title = (TextView) findViewById(R.id.tvTitle);
switch (random.nextInt(2)) {
case 0:
title.setGravity(Gravity.RIGHT);
break;
case 1:
title.setGravity(Gravity.CENTER);
break;
case 2:
title.setGravity(Gravity.LEFT);
break;
}
title.setTextColor(Color.rgb(random.nextInt(250), random.nextInt(250), random.nextInt(250)));
title.setTextSize(random.nextInt(55) + 10);
}
}
そしてこれは私のLogCatです
02-20 10:53:19.293: I/Adreno200-EGLSUB(5816): <ConfigWindowMatch:2078>: Format RGBA_8888.
02-20 10:53:19.303: D/memalloc(5816): /dev/pmem: Mapped buffer base:0x5c914000 size:14135296 offset:10366976 fd:64
02-20 10:53:19.303: E/(5816): Can't open file for reading
02-20 10:53:19.303: E/(5816): Can't open file for reading
02-20 10:53:19.303: D/OpenGLRenderer(5816): Enabling debug mode 0
02-20 10:53:19.373: D/memalloc(5816): /dev/pmem: Mapped buffer base:0x5db58000 size:3768320 offset:0 fd:67
02-20 10:53:20.143: W/dalvikvm(5816): threadid=11: thread exiting with uncaught exception (group=0x40abc210)
02-20 10:53:20.143: E/AndroidRuntime(5816): FATAL EXCEPTION: Thread-3102
02-20 10:53:20.143: E/AndroidRuntime(5816): android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
02-20 10:53:20.143: E/AndroidRuntime(5816): at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4039)
02-20 10:53:20.143: E/AndroidRuntime(5816): at android.view.ViewRootImpl.invalidateChild(ViewRootImpl.java:722)
02-20 10:53:20.143: E/AndroidRuntime(5816): at android.view.ViewRootImpl.invalidateChildInParent(ViewRootImpl.java:771)
02-20 10:53:20.143: E/AndroidRuntime(5816): at android.view.ViewGroup.invalidateChild(ViewGroup.java:4112)
02-20 10:53:20.143: E/AndroidRuntime(5816): at android.view.View.invalidate(View.java:8639)
02-20 10:53:20.143: E/AndroidRuntime(5816): at android.view.View.invalidate(View.java:8590)
02-20 10:53:20.143: E/AndroidRuntime(5816): at android.widget.TextView.setGravity(TextView.java:2538)
02-20 10:53:20.143: E/AndroidRuntime(5816): at com.example.saikoro.MainActivity.title(MainActivity.java:58)
02-20 10:53:20.143: E/AndroidRuntime(5816): at com.example.saikoro.MainActivity$1.run(MainActivity.java:36)