blog出处：http://blog.csdn.net/allen315410/article/details/40264551
添加权限
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
图片查看器实现的图片的缩放效果使用的是开源组件PhotoView
地址：https://github.com/chrisbanes/PhotoView
compile 'com.github.chrisbanes:PhotoView:1.3.0'
布局代码
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.example.imagedemo.HackyViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/black" />
<TextView
android:id="@+id/indicator"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="@android:color/transparent"
android:gravity="center"
android:text="@string/viewpager_indicator"
android:textColor="@android:color/white"
android:textSize="18sp" />
</FrameLayout>
HeckyViewpager
public class HackyViewPager extends ViewPager {
private static final String TAG = "HackyViewPager";
public HackyViewPager(Context context) {
super(context);
}
public HackyViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
try {
return super.onInterceptTouchEvent(ev);
} catch (IllegalArgumentException e) {
// 不理会
Log.e(TAG, "hacky viewpager error1");
return false;
} catch (ArrayIndexOutOfBoundsException e) {
// 不理会
Log.e(TAG, "hacky viewpager error2");
return false;
}
}
}
图片查看器
就是一个activity
/**
* 图片查看器
*/
public class ImagePagerActivity extends FragmentActivity {
private static final String STATE_POSITION = "STATE_POSITION";
public static final String EXTRA_IMAGE_INDEX = "image_index";
public static final String EXTRA_IMAGE_URLS = "image_urls";
private HackyViewPager mPager;
private int pagerPosition;
private TextView indicator;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.image_detail_pager);
pagerPosition = getIntent().getIntExtra(EXTRA_IMAGE_INDEX, 0);
ArrayList<String> urls = getIntent().getStringArrayListExtra(
EXTRA_IMAGE_URLS);
mPager = (HackyViewPager) findViewById(R.id.pager);
ImagePagerAdapter mAdapter = new ImagePagerAdapter(
getSupportFragmentManager(), urls);
mPager.setAdapter(mAdapter);
indicator = (TextView) findViewById(R.id.indicator);
CharSequence text = getString(R.string.viewpager_indicator, 1, mPager
.getAdapter().getCount());
indicator.setText(text);
// 更新下标
mPager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageScrollStateChanged(int arg0) {
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageSelected(int arg0) {
CharSequence text = getString(R.string.viewpager_indicator, // %1$d/%2$d,%1$d表示需要替换的第一个整形内容
arg0 + 1, mPager.getAdapter().getCount());
indicator.setText(text);
}
});
if (savedInstanceState != null) {
pagerPosition = savedInstanceState.getInt(STATE_POSITION);
}
mPager.setCurrentItem(pagerPosition);
}
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putInt(STATE_POSITION, mPager.getCurrentItem());
}
private class ImagePagerAdapter extends FragmentStatePagerAdapter {
public ArrayList<String> fileList;
public ImagePagerAdapter(FragmentManager fm, ArrayList<String> fileList) {
super(fm);
this.fileList = fileList;
}
@Override
public int getCount() {
return fileList == null ? 0 : fileList.size();
}
@Override
public Fragment getItem(int position) {
String url = fileList.get(position);
return ImageDetailFragment.newInstance(url);
}
}
}
图片界面为fragment
图片界面
image_detail_fragment.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/black" >
<ImageView
android:id="@+id/image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:layout_centerInParent="true"
android:contentDescription="@string/app_name"
android:scaleType="centerCrop" />
<ProgressBar
android:id="@+id/loading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:visibility="gone" />
</RelativeLayout>
图片界面代码
/**
* 单张图片显示Fragment
*/
public class ImageDetailFragment extends Fragment {
private String mImageUrl;
private ImageView mImageView;
private ProgressBar progressBar;
private PhotoViewAttacher mAttacher;
public static ImageDetailFragment newInstance(String imageUrl) {
final ImageDetailFragment f = new ImageDetailFragment();
final Bundle args = new Bundle();
args.putString("url", imageUrl);
f.setArguments(args);
return f;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mImageUrl = getArguments() != null ? getArguments().getString("url")
: null;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View v = inflater.inflate(R.layout.image_detail_fragment,
container, false);
mImageView = (ImageView) v.findViewById(R.id.image);
mAttacher = new PhotoViewAttacher(mImageView);
mAttacher.setOnPhotoTapListener(new OnPhotoTapListener() {
@Override
public void onPhotoTap(View arg0, float arg1, float arg2) {
getActivity().finish();
}
});
progressBar = (ProgressBar) v.findViewById(R.id.loading);
return v;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Glide.with(this).load(mImageUrl).into(mImageView);//采用Glide框架
}
}
点击实现
ArrayList<String> imageUrls = new ArrayList<>();
//添加数据
......
gridview的布局与初始化省略：
// 点击回帖九宫格，查看大图
gridview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
imageBrower(position, imageUrls);
}
});
imageBrower(int position, ArrayList<String> imageUrls) 如下所示
/**
* 打开图片查看器
*
* @param position
* @param urls2
*/
protected void imageBrower(int position, ArrayList<String> urls2) {
Intent intent = new Intent(mContext, ImagePagerActivity.class);
// 图片url,为了演示这里使用常量，一般从数据库中或网络中获取
intent.putExtra(ImagePagerActivity.EXTRA_IMAGE_URLS, urls2);
intent.putExtra(ImagePagerActivity.EXTRA_IMAGE_INDEX, position);
mContext.startActivity(intent);
}
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