Android/Java网络加载框架Retrofit（二）load bitmap into ListView

待我称王封你为后i 2024-02-18 15:49 34阅读 0赞

**Android/Java网络加载框架Retrofit（二）load bitmap into ListView**

package zhangphil.http;
    
    import android.app.ListActivity;
    import android.graphics.Bitmap;
    import android.graphics.BitmapFactory;
    import android.os.Bundle;
    import android.support.annotation.NonNull;
    import android.support.annotation.Nullable;
    import android.util.Log;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ArrayAdapter;
    import android.widget.ImageView;
    
    import java.util.ArrayList;
    
    import okhttp3.ResponseBody;
    import retrofit2.Call;
    import retrofit2.Callback;
    import retrofit2.Response;
    import retrofit2.Retrofit;
    import retrofit2.http.GET;
    import retrofit2.http.Path;
    
    public class MainActivity extends ListActivity {
        private MyRetrofitService mRetrofitService;
        private ArrayList<Call> mCalls = new ArrayList<>();
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
    
            Retrofit mRetrofit = new Retrofit.Builder()
                    .baseUrl("https://www.baidu.com/")
                    .build();
    
            mRetrofitService = mRetrofit.create(MyRetrofitService.class);
    
            ArrayAdapter mArrayAdapter = new ArrayAdapter(this, 0) {
                @NonNull
                @Override
                public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
                    ImageView imageView = new ImageView(getContext());
                    setBitmap("bd_logo1.png", imageView);
                    return imageView;
                }
    
                @Override
                public int getCount() {
                    return 10;
                }
            };
    
            setListAdapter(mArrayAdapter);
        }
    
        private void setBitmap(String picName, final ImageView imageView) {
            final Call mCall = mRetrofitService.getImagesByName(picName);
            mCall.enqueue(new Callback<ResponseBody>() {
                @Override
                public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
                    try {
                        Log.d("请求的网络链接", String.valueOf(mCall.request().url()));
    
                        byte[] bytes = response.body().bytes();
                        Bitmap bmp = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
    
                        imageView.setImageBitmap(bmp);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
    
                @Override
                public void onFailure(Call<ResponseBody> call, Throwable t) {
                    t.printStackTrace();
                }
            });
    
            mCalls.add(mCall);
        }
    
        private interface MyRetrofitService {
            @GET("img/{picName}")
            Call<ResponseBody> getImagesByName(@Path("picName") String picName);
        }
    
        @Override
        protected void onDestroy() {
            super.onDestroy();
    
            for (Call call : mCalls) {
                call.cancel();
            }
        }
    }