IT资讯---------显示图片

该App已经上传到百度应用市场：http://shouji.baidu.com/soft/item?docid=8928185&from=as&f=search_app_it%E8%B5%84%E8%AE%AF%40list_1_image%402%40header_all_input

有兴趣的可以下载看看。接下来我会公布源代码，不过该App并没有使用代码混淆，所以可以通过反编译清楚的看到源码。

以下是布局文件

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:gesture-image="http://schemas.polites.com/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <com.polites.android.GestureImageView
        android:id="@+id/image"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        gesture-image:max-scale="10.0"
        gesture-image:min-scale="0.75" />

    <ProgressBar
        android:id="@+id/loading"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:visibility="visible" />

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:background="@color/transparentblack" >

        <ImageView
            android:id="@+id/back"
            android:onClick="back"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/back_btn" />

        <ImageView
            android:id="@+id/download"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right|center_vertical"
            android:layout_marginRight="16dp"
            android:clickable="true"
            android:focusable="true"
            android:onClick="downloadImg"
            android:src="@drawable/download_btn" />
    </FrameLayout>

显示源码：

public class ImageShowActivity extends BaseActivityImpl {

    private String url;
    private ProgressBar loading;
    private GestureImageView gestureImageView;
    private Bitmap bitmap;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_image_page);

        //拿到图片的URL
        url = getIntent().getExtras().getString("url");
        loading = (ProgressBar) findViewById(R.id.loading);
        gestureImageView = (GestureImageView) findViewById(R.id.image);
        new DownLoadImgTask().execute();
    }

    /**
     * 点击返回按钮
     *
     * @param view
     */
    public void back(View view) {
        finish();
    }

    /**
     * 下载图片
     *
     * @param view
     */
    public void downloadImg(View view) {
        gestureImageView.setDrawingCacheEnabled(true);
        if (FileUtil.writeSDcard(url, gestureImageView.getDrawingCache())) {
            Toast.makeText(getApplicationContext(), "保存成功", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(getApplicationContext(), "保存失败", Toast.LENGTH_SHORT).show();
        }
        gestureImageView.setDrawingCacheEnabled(false);     //禁用DrawingCahce否则会影响性能
    }

    class DownLoadImgTask extends AsyncTask<Void, Void, Void> {
        @Override
        protected Void doInBackground(Void... params) {
            bitmap = HttpUtil.HttpGetImg(url, getApplicationContext());
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            gestureImageView.setImageBitmap(bitmap);
            loading.setVisibility(View.GONE);
            super.onPostExecute(result);
        }
    }