Question

我已经尝试设置自动完成文本视图的下拉颜色，它在所有其他api中正常工作但是当我使用nexus 5棉花糖运行它时出现以下错误

我的日志猫是

11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime: FATAL EXCEPTION: main
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime: Process: test.text.com, PID: 29058
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'android.graphics.drawable.Drawable android.support.v7.internal.widget.TintManager.getDrawable(int)' on a null object reference
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at android.support.v7.widget.AppCompatAutoCompleteTextView.setDropDownBackgroundResource(AppCompatAutoCompleteTextView.java:96)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at test.text.com.activity.CreateRideActivity.onWindowFocusChanged(CreateRideActivity.java:369)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at android.support.v7.internal.view.WindowCallbackWrapper.onWindowFocusChanged(WindowCallbackWrapper.java:114)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at android.support.v7.internal.view.WindowCallbackWrapper.onWindowFocusChanged(WindowCallbackWrapper.java:114)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at com.android.internal.policy.PhoneWindow$DecorView.onWindowFocusChanged(PhoneWindow.java:3237)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at android.view.View.dispatchWindowFocusChanged(View.java:9528)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:1200)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at android.view.ViewRootImpl$ViewRootHandler.handleMessage(ViewRootImpl.java:3378)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:102)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:148)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5417)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Native Method)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
11-02 17:36:23.815 29058-29058/test.text.com E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

我的代码是

AutoSuggestView.setDropDownBackgroundResource(R.drawable.bg_rectangle_white_curve_border_right);

Answer 1

尝试更新您的appcompat库。在appcompat-v7的当前（23.1.1）版本中，AppCompatAutoCompleteTextView中的代码已更改为解决此问题

 public void setDropDownBackgroundResource(@DrawableRes int resId) {
        if (mTintManager != null) {
            setDropDownBackgroundDrawable(mTintManager.getDrawable(resId));
        } else {
            super.setDropDownBackgroundResource(resId);
        }
    }

setDropDownBackgroundResource在marshmallows android中不起作用

1 个答案: