我有以下格式的JSON结果,JSON Lint将其显示为"有效响应".
我的问题是:如何访问"question_mark"的内容,因为"141","8911"等都是动态值？
我的示例代码用于访问"product"的值.
//Consider I have the first <code>JSONObject</code> of the "search_result" array and
//I access it's "product" value as below.
String product = jsonObject.optString("product"); //where jsonObject is of type JSONObject.
//<code>product<code> now contains "abc".
JSON:
{
"status": "OK",
"search_result": [
{
"product": "abc",
"id": "1132",
"question_mark": {
"141": {
"count": "141",
"more_description": "this is abc",
"seq": "2"
},
"8911": {
"count": "8911",
"more_desc": "this is cup",
"seq": "1"
}
},
"name": "some name",
"description": "This is …我正在尝试通过在我的项目中使用Picasso库来设置图像.
当我点击View的图像时,我在Picasso执行时遇到错误.
该应用程序的Logcat
java.lang.IllegalArgumentException: Target must not be null.
at com.squareup.picasso.RequestCreator.into(RequestCreator.java:340)
at com.squareup.picasso.RequestCreator.into(RequestCreator.java:326)
at com.zafer.celaloglu.FragmentsandActivities.UnfoldableDetailsFragment.openDetails(UnfoldableDetailsFragment.java:89)
at com.zafer.celaloglu.model.PaintingsAdapter.onClick(PaintingsAdapter.java:52)
at android.view.View.performClick(View.java:4084)
at android.view.View$PerformClick.run(View.java:16966)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
UnfoldableDetailsFragment 89 =
public void openDetails(View coverView, Painting painting) {
ImageView image = (ImageView) coverView.findViewById(R.id.details_image);
TextView title = (TextView) coverView.findViewById(R.id.details_title);
TextView description = (TextView) coverView.findViewById(R.id.details_text);
Picasso.with(getActivity()).load(painting.getImageId()).into(image); ->89. LINE
Log.i("bilgi", "basildi");
title.setText(painting.getTitle());
SpannableBuilder builder = new SpannableBuilder(getActivity());
builder
.createStyle().setFont(Typeface.DEFAULT_BOLD).apply()
.append(R.string.year).append(": …如何在没有任何第三方插件的情况下更新状态栏图标的颜色？
在我的主题课程中，我有一个函数，我正在尝试下面的代码，但尚未实现结果：
目前的主题代码：
// custom light theme for app
static final customLightTheme = ThemeData.light().copyWith(
brightness: Brightness.light,
primaryColor: notWhite,
accentColor: Colors.amberAccent,
scaffoldBackgroundColor: notWhite,
primaryTextTheme: TextTheme(
title: TextStyle(
color: Colors.black
),
),
appBarTheme: AppBarTheme(
iconTheme: IconThemeData(color: Colors.black),
elevation: 0.0,
)
);
// custom dark theme for app
static final customDarkTheme = ThemeData.dark().copyWith(
brightness: Brightness.dark,
primaryColor: Colors.black,
accentColor: Colors.orange,
scaffoldBackgroundColor: Colors.black87,
primaryTextTheme: TextTheme(
title: TextStyle(
color: Colors.white
),
),
appBarTheme: AppBarTheme(
iconTheme: IconThemeData(color: Colors.white),
elevation: 0.0,
),
);
主题更改代码：
// set theme for …Build is failing with the following error upon enabling R8 on android studio 3.4-RC3. Build is successful if android.enableR8=false
Undefined value encountered during compilation. This is typically caused by invalid dex input that uses a register that is not define on all control-flow paths leading to the use.
What is this undefined value and how do I fix this error?
> Task :app:transformClassesAndResourcesWithR8ForStageInternal FAILED
D8: Undefined value encountered during compilation. This is typically caused by invalid dex input that uses …我收到此错误的错误"类型View中的方法setOnKeyListener(View.OnKeyListener)不适用于参数(new OnKeyListener(){})"
我怎样才能克服这个问题？
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first_app);
ListView myListView =(ListView)findViewById(R.id.myListView);
final EditText myEditText =(EditText)findViewById(R.id.myEditText);
final ArrayList<String> toDolist =new ArrayList<String>();
final ArrayAdapter<String> aa;
aa=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,toDolist);
myListView.setAdapter(aa);
myEditText.setOnKeyListener(new OnKeyListener() {
public boolean onKey(View v, int keyCode, KeyEvent event) {
if(event.getAction()==KeyEvent.ACTION_DOWN)
if(keyCode==KeyEvent.KEYCODE_DPAD_CENTER){
toDolist.add(0,myEditText.getText().toString());
aa.notifyDataSetChanged();
myEditText.setText("");
return true;
}
return false;
}
});
首先我想解释一下我的问题，
Slide menu在我的应用程序中。我为此使用了 android.support.v4.app.Fragment我尝试了以下代码但没有用。
FragmentManager fm = AddCaseFile.this.getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
HospitalizationDetails fragment=new HospitalizationDetails();
ft.replace(R.id.activity_main_content_fragment,fragment);
ft.addToBackStack(null);
ft.commit();
AddCaseFile我目前的活动在哪里
HospitalizationDetails 是片段（我必须去）
提前致谢
大家好，我在 android 项目中使用毕加索，现在我的问题是我需要在毕加索正在加载的图像上显示一些内容，这就是为什么我想知道我如何知道毕加索何时加载了图像，因为只有这样我才能在该图像上添加文本。此外，如果 picasso 不提供此功能，那么在 android 中使用 picassso 是否还有其他方法可以做到这一点
Picasso.with(context).load("http://192.168.0.15:1337/offers/" + image_url.get(position)).resize(350, 100).centerCrop().into(holder.imageView);
现在在哪里设置图像上的文本。