Android常见问题总结

1.在项目中调用用Intent传入url打开界面的时候，遇到了异常：

android.os.FileUriExposedException

解决方式：在Application的onCreate中加入以下代码，过滤掉FileUriExposedException的异常

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
    StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
    StrictMode.setVmPolicy(builder.build());
 }

2.判断Activity是否消亡的方式

@Override
protected void onPostExecute(Void result) {
    final Activity activity = progressDialog.getOwnerActivity();

    if (activity == null || activity.isDestroyed() || activity.isFinishing()) {
        return;
    }
    if (progressDialog != null && progressDialog.isShowing()) {
        progressDialog.dismiss();
    }
}

3.创建handle

private final Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {

    }
};