android - 在 Android 应用程序上使用 Glide 时崩溃

Question

每次我尝试查看图像时，我的应用程序都会关闭。你能解释一下为什么吗？

我认为问题可能出在字符串 Glide.with(getApplicationContext()) 上，也许它不正确。但是对于 Android Studio 我没有错误:

其他元素都没问题，只是 Glide 有问题

public class MainActivity extends AppCompatActivity {

    private final String url= "MY ARRAY";
    ...

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ...
        new gson().execute(url);
    }

    public class gson extends AsyncTask<String,String, List<MovieModel> >{

    ....
public class Adapter extends ArrayAdapter{
    private List<MovieModel> movieModelList;
    private int resource;
    private LayoutInflater inflater;
    public Adapter(Context context, int resource, List<MovieModel> objects) {
        super(context, resource, objects);
        movieModelList = objects;
        this.resource = resource;
        inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
    }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if(convertView == null){
            holder = new ViewHolder();
            convertView = inflater.inflate(resource, null);
            holder.fruitsfoto = (ImageView)convertView.findViewById(R.id.fruits);
            holder.fruitsname = (TextView)convertView.findViewById(R.id.name);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        ImageView imageView = (ImageView) findViewById(R.id.pics);
        final ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressBar);
try {
Glide.with(MainActivity.this)//getApplicationContext()
        .load(ModelList.get(position).getImage())
        .listener(new RequestListener<String, GlideDrawable>() {
    @Override
    public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
        return false;
    }
    @Override
    public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
        progressBar.setVisibility(View.GONE);
        return false;
    }
})
        .into(imageView);
} catch (Exception e) {
    e.printStackTrace();
}
holder.fruitsname.setText(ModelList.get(position).getName());
return convertView;
            }
        }
    }

更新:显示图像不遵循数组列表。需要解决方案。

    public Adapter(Context context, int resource, List<MovieModel> objects) {
        super(context, resource, objects);
        ModelList = objects;
        this.resource = resource;
        inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
    }
.....
    try {
    Glide.with(MainActivity.this)//getApplicationContext()
            .load(ModelList.get(position).getFruits())
            .into(imageView);
    } catch (Exception e) {
        e.printStackTrace();
    }

编辑:

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;
    if(convertView == null){
        holder = new ViewHolder();
        convertView = inflater.inflate(resource, null);
        holder.fruitsfoto = (ImageView)convertView.findViewById(R.id.fruits);
        holder.fruitsname = (TextView)convertView.findViewById(R.id.name);
1)holder.image = (TextView)convertView.findViewById(R.id.pics);
2)ImageView imageView = (ImageView)convertView.findViewById(R.id.pics);            
convertView.setTag(holder);
//the first cause a crash
//the second return "Variable 'imageView is never used'"

这是控制台错误:

09-28 17:19:42.079 30111-30111/app E/AndroidRuntime: FATAL EXCEPTION: main
                                            Process: app, PID: 30111
                                            java.lang.NullPointerException
                                            at app$1.onResourceReady(MainActivity.java:309)
                                            at app$1.onResourceReady(MainActivity.java:301)
                                            at com.bumptech.glide.request.GenericRequest.onResourceReady(GenericRequest.java:522)
                                            at com.bumptech.glide.request.GenericRequest.onResourceReady(GenericRequest.java:507)
                                            at com.bumptech.glide.load.engine.EngineJob.handleResultOnMainThread(EngineJob.java:158)
                                            at com.bumptech.glide.load.engine.EngineJob.access$100(EngineJob.java:22)
                                            at com.bumptech.glide.load.engine.EngineJob$MainThreadCallback.handleMessage(EngineJob.java:202)
                                            at android.os.Handler.dispatchMessage(Handler.java:98)
                                            at android.os.Looper.loop(Looper.java:146)
                                            at android.app.ActivityThread.main(ActivityThread.java:5511)
                                            at java.lang.reflect.Method.invokeNative(Native Method)
                                            at java.lang.reflect.Method.invoke(Method.java:515)
                                            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
                                            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
                                            at dalvik.system.NativeStart.main(Native Method)

Answer 1

请检查您的应用程序 list 中是否添加了INTERNET权限？

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="viewpager.nested.example.com.testapplicationforso">

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        ...
    </application>

</manifest>

是的，将 Glide 图像加载代码段放在 try/catch 语句中总是好的。

try {
    Glide.with(getApplicationContext()).load(yourUrl).into(img);
} catch (Exception e) {
    e.printStackTrace();
}

更新:

关于错误放置的图像 - 我可以看到在您的 getView 函数中，您没有正确找到 ImageView。您需要像列表中的其他项目一样在 convertView 中找到 ImageView。

holder.image = (TextView)convertView.findViewById(R.id.pics);

// Then load the image in holder.image
Glide.with(MainActivity.this)//getApplicationContext()
    .load(ModelList.get(position).getFruits())
    .into(holder.image);