在imageview android应用程序中设置屏幕适配墙纸

Question

我有一个非常简单的图像视图应用程序，应该是设置墙纸时，用户点击任何图像。然而，我的问题是，当我在viewpager中显示完整的图像时。当用户点击图像时，它会占据设备或模拟器的整个屏幕。换句话说，图像在主屏幕中似乎被扭曲或剪切。谁能建议如何解决这个问题的代码，或者我的代码中遗漏了什么？我相信我必须更改ImageAdpater代码..但我不确定...以下是我的代码。

Mainactivity.java

import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ShareActionProvider;




public class MainActivity extends Activity {

    MediaPlayer oursong;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
      oursong = MediaPlayer.create(MainActivity.this, R.raw.a);
      oursong.start ();
    ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
    ImageAdapter adapter = new ImageAdapter(this);
    viewPager.setAdapter(adapter);
  }

  private ShareActionProvider mShareActionProvider;


  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      // Inflate menu resource file.
      getMenuInflater().inflate(R.menu.activity_main, menu);

      // Locate MenuItem with ShareActionProvider
      MenuItem item = menu.findItem(R.id.menu_item_share);

      // Fetch and store ShareActionProvider
      mShareActionProvider = (ShareActionProvider) item.getActionProvider();

      // Return true to display menu
      return true;
  }

  // Call to update the share intent
  private void setShareIntent(Intent shareIntent) {
      if (mShareActionProvider != null) {
          mShareActionProvider.setShareIntent(shareIntent);
      }
  }

     @Override
     protected void onPause(){
     super.onPause();
      oursong.release();
 }

}

Imageadapter.java

import java.io.IOException;

import android.app.WallpaperManager;
import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

public class ImageAdapter extends PagerAdapter {
    Context context;
    private final int[] GalImages = new int[] {
        R.drawable.one,
        R.drawable.two,
        R.drawable.three
    };
    ImageAdapter(Context context){
        this.context=context;
    }
    @Override
    public int getCount() {
      return GalImages.length;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
      return view == ((ImageView) object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, final int position) {
      ImageView imageView = new ImageView(context);
      int padding = context.getResources().getDimensionPixelSize(R.dimen.padding_small);
      imageView.setPadding(padding, padding, padding, padding);
      imageView.setScaleType(ImageView.ScaleType.FIT_XY);
      imageView.setImageResource(GalImages[position]);

      imageView.setOnClickListener(new View.OnClickListener() {

           public void onClick(View view) {

                    WallpaperManager myWallpaperManager  = WallpaperManager.getInstance(context);
                    try {
                            myWallpaperManager.setResource(GalImages[position]);
                    } catch (IOException e) {
                             // TODO Auto-generated catch block
                             e.printStackTrace();
                    }       

           }

           });


      ((ViewPager) container).addView(imageView, 0);
      return imageView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
      ((ViewPager) container).removeView((ImageView) object);
    }
  }

Answer 1

要设置墙纸，请尝试如下所示：

      @Override
    public Object instantiateItem(ViewGroup container, final int position) {
      final ImageView imageView = new ImageView(context);
      int padding = context.getResources().getDimensionPixelSize(1);
      imageView.setPadding(padding, padding, padding, padding);
      imageView.setScaleType(ImageView.ScaleType.FIT_XY);
      imageView.setImageResource(GalImages[position]);

      imageView.setOnClickListener(new View.OnClickListener() {

          public void onClick(View view) {

                 WallpaperManager myWallpaperManager
    = WallpaperManager.getInstance(context);
   try {
    Bitmap bitmap=((BitmapDrawable)imageView.getDrawable()).getBitmap();
    if(bitmap!=null)
    myWallpaperManager.setBitmap(bitmap);
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
          }
          });

      ((ViewPager) container).addView(imageView, 0);
      return imageView;
    }

Answer 2

也许那里的图片资源还不够大，不能完全适应屏幕。您确定资源图像具有正确的尺寸和比例吗？