can't create handler inside thread that has not called Looper.prepare
2016-12-31 22:17
579 查看
出现原因：不是在主线程（UI线程）中
demo
下面的代码会抛出如题的异常信息new Thread(new Runnable() {
@Override
public void run() {
try {
// 模拟耗时操作
Thread.sleep(1000 * 2);
Toast.makeText(getApplicationContext(), "下载成功", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
e.printStackTrace();
}
}
});常用解决办法
使用 android.os.Handler使用 android.app.Activity 类的 public final void android.app.Activity.runOnUiThread(Runnable action) 方法
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