Android-screenshot：屏幕截图

ScreenShot_activity_dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#00000000"/><!-- 实体设置为透明 -->
    <!-- 描边：一般大小都是1dp -->
    <stroke android:width="1dp" android:color="#FFFFFF" />
    <!-- 边角的圆弧半径 -->
    <corners android:radius="20dp" />
    <!-- 四周留出来的空白,和xml文件中的pad效果一样，对内起作用 -->
    <padding android:left="1dp" android:top="1dp" android:right="1dp"
        android:bottom="1dp" />
</shape>

ScreenShot_AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.ssfb"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="11"
        android:targetSdkVersion="18" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_FRAME_BUFFER"/>
	  <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:theme="@style/dialog">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

ScreenShot_MainActivity.java

public class MainActivity extends Activity {

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

        try {
            Runtime.getRuntime().exec(
                    new String[]{"/system/bin/su", "-c",
                            "chmod 777 /dev/graphics/fb0"});
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        SimpleDateFormat sDay = new SimpleDateFormat("yyyyMMdd");
        SimpleDateFormat sTime = new SimpleDateFormat("HHmmss");
        String date = sDay.format(new java.util.Date()) + "_" + sTime.format(new java.util.Date());

        DateFormat df = new SimpleDateFormat("HH:mm:ss");
        String d = df.format(new Date());
        Log.i("out", d);

       /* Time t = new Time(); // or Time t=new Time("GMT+8"); 加上Time Zone资料。
        t.setToNow(); // 取得系统时间。
        int year = t.year;
        int month = t.month;
        int day = t.monthDay;
        int hour = t.hour; // 0-23
        int minute = t.minute;
        int second = t.second;
        String date = "" + year + month + day + hour + minute + second;*/
        Log.i("out", date);

        String path = "/sdcard/" + date + ".png";
        Log.i("out", path);

        try {
            // screenShot();
            // screenCapture("/sdcard/jietu.png");

            screenCapture("/sdcard/" + date + ".png");

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    private void startMyService() {
        Intent intent = new Intent(this, MyService.class);
        startService(intent);
        this.finish();
    }

    /**
     * 第一种方法
     * 类似于getview那个方法，好像只能获取当前activity的截图，但是缩略图显示确实是当前屏幕截屏
     */
    private void screenShot() throws Exception {
        Process sh = Runtime.getRuntime().exec("su", null, null);
        OutputStream os = sh.getOutputStream();
        os.write(("/system/bin/screencap -p " + "/sdcard/img_shot.png").getBytes("ASCII"));
        os.flush();
        os.close();
        sh.waitFor();
    }

    /**
     * 第二种方法
     *
     * @param path 图片保存路径
     */
    public void screenCapture(String path) {
        Process process = null;
        try {
            process = Runtime.getRuntime().exec("su");
            PrintStream outputStream = null;
            try {
                outputStream = new PrintStream(new BufferedOutputStream(process.getOutputStream(), 8192));
                outputStream.println("screencap -p " + path);
                outputStream.flush();
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if (outputStream != null) {
                    outputStream.close();
                }
            }
            process.waitFor();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (process != null) {
                process.destroy();
            }
            this.finish();
        }
    }

    /**
     * 第三种方法
     */
    private void getFromFramebuffer() throws Exception {
        // 获取屏幕大小
        DisplayMetrics metrics = new DisplayMetrics();
        Context mContext = this;
        WindowManager WM = (WindowManager) mContext
                .getSystemService(Context.WINDOW_SERVICE);
        Display display = WM.getDefaultDisplay();
        display.getMetrics(metrics);
        int height = metrics.heightPixels; // 屏幕高
        int width = metrics.widthPixels; // 屏幕的宽

        int pixelformat = display.getPixelFormat();
        PixelFormat localPixelFormat1 = new PixelFormat();
        PixelFormat.getPixelFormatInfo(pixelformat, localPixelFormat1);
        int deepth = localPixelFormat1.bytesPerPixel;// 位深

		    /*
         * byte[] piex = new byte[height * width * deepth];
		     * 
		     * InputStream stream = getInputStream(); DataInputStream dStream = new
		     * DataInputStream(stream); dStream.readFully(piex);
		     */

        // Bitmap bitmap = Bitmap.createBitmap(data, width, height, 4);

        // byte[] piex =new byte[height * with * deepth];
        // DataInputStream dStream = new DataInputStream(input);
        // dStream.readFully(piex);

        InputStream stream = getInputStream();
        DataInputStream dStream = new DataInputStream(stream);
        DataInput frameBuffer = new DataInputStream(dStream);
        int[] data = new int[height * width * deepth / 2];
        // convertToRgba32(frameBuffer, data);
        convertToRgb565(frameBuffer, data);
        Bitmap bm = Bitmap.createBitmap(data, width, height,
                Bitmap.Config.ARGB_4444);
        // _imageview.setImageBitmap(bm);
        File imageFile = new File(Environment.getExternalStorageDirectory()
                + "/截屏.png");
        imageFile.createNewFile();
        FileOutputStream out = new FileOutputStream(imageFile);
        bm.compress(Bitmap.CompressFormat.PNG, 100, out);
        out.flush();
        out.close();
    }

    public static void convertToRgb565(DataInput frameBuffer, int[] into) {
        for (int x = 0; x < into.length; x++) {
            try {
                into[x] = frameBuffer.readShort();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    public static InputStream getInputStream() throws Exception {
        FileInputStream buf = new FileInputStream(new File("/dev/graphics/fb0"));
        return buf;
    }// get the InputStream from framebuffer

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

ScreenShot_style.xml

<style name="dialog" parent="@android:style/Theme.Dialog">
        <item name="android:windowBackground">@drawable/activity_dialog</item>
        <item name="android:windowFrame">@null</item>
        <!-- activity无黑边 -->
        <item name="android:windowIsFloating">true</item>
        <!-- activity可滑动 -->
        <item name="android:windowIsTranslucent">false</item>
        <!-- activity透明 -->
        <item name="android:windowNoTitle">true</item>
        <!-- activity无标题 -->
        <!-- <item name="android:windowBackground">@null</item>-->
        <item name="android:backgroundDimEnabled">false</item>
        <!-- activity不变暗 -->
        <item name="android:windowCloseOnTouchOutside">false</item>
        <!-- activity点击空白部分不消失 -->
</style>

采用的是第二种方法，将Activity缩小透明化，并在执行完成house执行this.finish()。

activity_dialog.xml 放在res/drawble/ 下，记得在style.xml中添加background，manifest中记得调用style。