Android截图

Android截图很好的实现，从文档的发展，查看View有一个接口getDrawingCache()，这个接口可以得到View当调用这个接口的位图图像Bitmap。

抓取截图View在图像的某一个时刻。它包括addView此View所有的孩子View图像，比方在截取Activity时。图像是不会包括浮如今activity上方的对话框的

以下的代码是截取图像而且经过http post接口上传到server的样例，截图并上传的核心代码例如以下：

Screenshot.java

package com.example.scrmdemo;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.view.View;

public class Screenshot {

public static Bitmap takeScreenshotForView(View view) {
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap tempBit = view.getDrawingCache();
Rect frame = new Rect();
view.getWindowVisibleDisplayFrame(frame);
int width = view.getWidth();
int height = view.getHeight();
Bitmap bitmap = Bitmap.createBitmap(tempBit, 0, 0, width, height);
view.destroyDrawingCache();
return bitmap;
}

public static Bitmap takeScreenshotForActivity(Activity activity) {
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap tempBit = view.getDrawingCache();
Rect frame = new Rect();
view.getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
int width = view.getWidth();
int height = view.getHeight();
Bitmap bitmap = Bitmap.createBitmap(tempBit, 0, statusBarHeight, width,
height - statusBarHeight);
view.destroyDrawingCache();
return bitmap;
}

public static Drawable BitmapToDrawable(Bitmap bitmap) {
@SuppressWarnings("deprecation")
BitmapDrawable bd = new BitmapDrawable(bitmap);
Drawable drawable = (Drawable) bd;
return drawable;
}

public static boolean savePic(Bitmap bitmap, String fileName) {
try {
File file = new File(fileName);
if (!file.getParentFile().exists()) {
file.getParentFile().mkdirs();
}
FileOutputStream fos = null;
fos = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
return true;
} catch (FileNotFoundException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}

public static byte[] getBytes(Bitmap bitmap) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
try {
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
return out.toByteArray();
}

interface ISharePicCallBack {
public final static int SHARE_OK = 1;
public final static int SHARE_NOTOK = 2;

public void shareResult(int resultCode, String output);
}

public static void share(final String urlStr, final Bitmap bitmap,
final ISharePicCallBack callBack) {
new Thread() {
public void run() {
try {
URL url = new URL(urlStr);
HttpURLConnection httpConn = (HttpURLConnection) url
.openConnection();
httpConn.setDoOutput(true);
httpConn.setDoInput(true);
httpConn.setUseCaches(false);
httpConn.setRequestMethod("POST");
byte[] requestStringBytes = getBytes(bitmap);
httpConn.setRequestProperty("Content-length", ""
+ requestStringBytes.length);
httpConn.setRequestProperty("Content-Type",
"application/octet-stream");
httpConn.setRequestProperty("Connection", "Keep-Alive");
httpConn.setRequestProperty("Charset", "UTF-8");
OutputStream outputStream = httpConn.getOutputStream();
outputStream.write(requestStringBytes);
outputStream.flush();
outputStream.close();
if (HttpURLConnection.HTTP_OK == httpConn.getResponseCode()) {
StringBuffer sb = new StringBuffer();
String readLine;
BufferedReader responseReader;
responseReader = new BufferedReader(
new InputStreamReader(
httpConn.getInputStream(), "UTF-8"));
while ((readLine = responseReader.readLine()) != null) {
sb.append(readLine).append("\n");
}
responseReader.close();
callBack.shareResult(ISharePicCallBack.SHARE_OK,
sb.toString());
} else {
callBack.shareResult(ISharePicCallBack.SHARE_NOTOK, ""
+ httpConn.getResponseCode());
}
} catch (IOException e) {
callBack.shareResult(ISharePicCallBack.SHARE_NOTOK, "");
e.printStackTrace();
}
};
}.start();
}
}

使用本文件时。须要向Androidproject的AndroidManifest.xml配置文件里加入两个权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.INTERNET"/>