Android 实用方法 — 截屏与截长图功能的实现
Demo在GitHub的地址：https://github.com/Hebin320/ScreenShootDemo在CSDN上的下载地址：http://download.csdn.net/detail/hebin320320/9721970在Android开发中，有时候会遇到需要截屏分享到朋友圈或者QQ，截屏有截取当前屏幕，也有需要截取不仅一个屏幕，可能会很长。截取当前屏幕并保存到内存卡的方法：// 获取指定Activity的截屏，保存到png文件public static Bitmap takeScreenShot(Activity activity) {
// View是你需要截图的View
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap b1 = view.getDrawingCache();
// 获取状态栏高度
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
System.out.println(statusBarHeight);
// 获取屏幕长和高
int width = activity.getWindowManager().getDefaultDisplay().getWidth();
int height = activity.getWindowManager().getDefaultDisplay()
.getHeight();
// 去掉标题栏
// Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);
Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height
- statusBarHeight);
view.destroyDrawingCache();
return b;
}
// 保存到sdcard
public static void savePic(Bitmap b, String strFileName) {
FileOutputStream fos = null;
try {
fos = new FileOutputStream(strFileName);
if (null != fos) {
b.compress(Bitmap.CompressFormat.PNG, 90, fos);
fos.flush();
fos.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
// 程序入口 截取当前屏幕
public static void shootLoacleView(Activity a,String picpath) {
ScreenShot.savePic(ScreenShot.takeScreenShot(a), picpath);
}当视图超过一个屏幕的时候，可能是listview，也可能是Scrollview，这时候，其实截图就是对listview或者Scrollview进行截图： /**
* 截取scrollview的屏幕
* **/
public static Bitmap getScrollViewBitmap(ScrollView scrollView,String picpath) {
int h = 0;
Bitmap bitmap;
// 获取listView实际高度
for (int i = 0; i < scrollView.getChildCount(); i++) {
h += scrollView.getChildAt(i).getHeight();
}
Log.d(TAG, "实际高度:" + h);
Log.d(TAG, " 高度:" + scrollView.getHeight());
// 创建对应大小的bitmap
bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,
Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmap);
scrollView.draw(canvas);
// 测试输出
FileOutputStream out = null;
try {
out = new FileOutputStream(picpath);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
try {
if (null != out) {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
}
} catch (IOException e) {
}
return bitmap;
}
private static String TAG = "Listview and ScrollView item 截图:";
/**
*截图listview
* **/
public static Bitmap getListViewBitmap(ListView listView,String picpath) {
int h = 0;
Bitmap bitmap;
// 获取listView实际高度
for (int i = 0; i < listView.getChildCount(); i++) {
h += listView.getChildAt(i).getHeight();
}
Log.d(TAG, "实际高度:" + h);
Log.d(TAG, "list 高度:" + listView.getHeight());
// 创建对应大小的bitmap
bitmap = Bitmap.createBitmap(listView.getWidth(), h,
Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmap);
listView.draw(canvas);
// 测试输出
FileOutputStream out = null;
try {
out = new FileOutputStream(picpath);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
try {
if (null != out) {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
}
} catch (IOException e) {
}
return bitmap;
}
// 程序入口 截取ScrollView
public static void shootScrollView(ScrollView scrollView,String picpath) {
ScreenShot.savePic(getScrollViewBitmap(scrollView, picpath), picpath);
}
// 程序入口 截取ListView
public static void shootListView(ListView listView,String picpath) {
ScreenShot.savePic(getListViewBitmap(listView,picpath), picpath);
}
截长图的效果图：
http://img.blog.csdn.net/20160414151250154
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