下面列出了android.view.View#getDrawingCacheBackgroundColor ( ) 实例代码,或者点击链接到github查看源代码,也可以在右侧发表评论。
/**
* Draw the view into a bitmap.
*/
private Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
Log.e(TAG, "failed getViewBitmap(" + v + ")", new RuntimeException());
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
public static Bitmap loadBitmapFromViewCache(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (null == cacheBitmap) return null;
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* 通过 View Cache 绘制为 Bitmap
* @param view {@link View}
* @return {@link Bitmap}
*/
public static Bitmap getBitmapFromViewCache(final View view) {
if (view == null) return null;
try {
// 清除视图焦点
view.clearFocus();
// 将视图设为不可点击
view.setPressed(false);
// 获取视图是否可以保存画图缓存
boolean willNotCache = view.willNotCacheDrawing();
view.setWillNotCacheDrawing(false);
// 获取绘制缓存位图的背景颜色
int color = view.getDrawingCacheBackgroundColor();
// 设置绘图背景颜色
view.setDrawingCacheBackgroundColor(0);
if (color != 0) { // 获取的背景不是黑色的则释放以前的绘图缓存
view.destroyDrawingCache(); // 释放绘图资源所使用的缓存
}
// 重新创建绘图缓存, 此时的背景色是黑色
view.buildDrawingCache();
// 获取绘图缓存, 注意这里得到的只是一个图像的引用
Bitmap cacheBitmap = view.getDrawingCache();
if (cacheBitmap == null) return null;
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// 释放位图内存
view.destroyDrawingCache();
// 回滚以前的缓存设置、缓存颜色设置
view.setWillNotCacheDrawing(willNotCache);
view.setDrawingCacheBackgroundColor(color);
return bitmap;
} catch (Exception e) {
LogPrintUtils.eTag(TAG, e, "getBitmapFromViewCache");
}
return null;
}
/**
* Draw the view into a bitmap.
*/
Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
float alpha = v.getAlpha();
v.setAlpha(1.0f);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
Log.e(TAG, "failed getViewBitmap(" + v + ")", new RuntimeException());
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setAlpha(alpha);
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
private Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* 把一个View的对象转换成bitmap
*
* @param view View
* @return Bitmap
*/
public static Bitmap getBitmapFromView2(View view) {
if (view == null) {
return null;
}
view.clearFocus();
view.setPressed(false);
// 能画缓存就返回false
boolean willNotCache = view.willNotCacheDrawing();
view.setWillNotCacheDrawing(false);
int color = view.getDrawingCacheBackgroundColor();
view.setDrawingCacheBackgroundColor(0);
if (color != 0) {
view.destroyDrawingCache();
}
view.buildDrawingCache();
Bitmap cacheBitmap = view.getDrawingCache();
if (cacheBitmap == null) {
XPrintUtils.e( "failed getViewBitmap(" + view + ") -->"+
new RuntimeException());
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
view.destroyDrawingCache();
view.setWillNotCacheDrawing(willNotCache);
view.setDrawingCacheBackgroundColor(color);
return bitmap;
}
public void onStartDrag(View itemView) {
itemView.setVisibility(View.INVISIBLE);
defaultBackgroundColor = itemView.getDrawingCacheBackgroundColor();
itemView.setBackgroundColor(backgroundColor);
ImageView iv = (ImageView) itemView.findViewById(R.id.ImageView01);
if (iv != null)
iv.setVisibility(View.INVISIBLE);
}
/**
* Draw the view into a bitmap.
*/
protected Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(Color.TRANSPARENT);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
android.util.Log.e(TAG, "failed getViewBitmap(" + JoH.backTrace() + ")", new RuntimeException());
v.destroyDrawingCache(); // duplicate of below, flow could be reordered better
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* Draw the view into a bitmap.
*/
private Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(Color.TRANSPARENT);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
android.util.Log.e(TAG, "failed getViewBitmap(" + JoH.backTrace() + ")", new RuntimeException());
v.destroyDrawingCache(); // duplicate of below, flow could be reordered better
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
public static Bitmap loadBitmapFromViewCache(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (null == cacheBitmap) return null;
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* Draw the view into a bitmap.
*/
private Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
Log.e(TAG, "failed getViewBitmap(" + v + ")", new RuntimeException());
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* 把一个View的对象转换成bitmap
*
* @param view View
* @return Bitmap
*/
public static Bitmap getBitmapFromView2(View view) {
view.clearFocus();
view.setPressed(false);
// 能画缓存就返回false
boolean willNotCache = view.willNotCacheDrawing();
view.setWillNotCacheDrawing(false);
int color = view.getDrawingCacheBackgroundColor();
view.setDrawingCacheBackgroundColor(0);
if (color != 0) {
view.destroyDrawingCache();
}
view.buildDrawingCache();
Bitmap cacheBitmap = view.getDrawingCache();
if (cacheBitmap == null) {
if (DEBUG) {
Logger.e("failed getViewBitmap(" + view + ")",
new RuntimeException());
}
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
view.destroyDrawingCache();
view.setWillNotCacheDrawing(willNotCache);
view.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* Draw the view into a bitmap.
*/
Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
float alpha = v.getAlpha();
v.setAlpha(1.0f);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
Log.e(TAG, "failed getViewBitmap(" + v + ")", new RuntimeException());
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setAlpha(alpha);
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* @param view
* @return
* @deprecated use {@link #getCacheBitmap(View,Bitmap.Config)}
* <br>感觉这个不好 会清除一些状态</br>
* 仅仅为了得到的位图是RGB 565吧
* 但是 结果来看 大部分还是RGB8888 要和 View.mUse32BitDrawingCache相关
*/
public static Bitmap getCacheBitmap_ConifgByWindow(View view) {
// 将一个View转化成一张图片
view.clearFocus(); // 清除视图焦点
view.setPressed(false);// 将视图设为不可点击
boolean willNotCache = view.willNotCacheDrawing(); // 返回视图是否可以保存他的画图缓存
view.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation //将视图在此操作时置为透明
int color = view.getDrawingCacheBackgroundColor(); // 获得绘制缓存位图的背景颜色
view.setDrawingCacheBackgroundColor(0); // 设置绘图背景颜色
if (color != 0) { // 如果获得的背景不是黑色的则释放以前的绘图缓存
view.destroyDrawingCache(); // 释放绘图资源所使用的缓存
}
view.buildDrawingCache(); // 重新创建绘图缓存,此时的背景色是黑色
Bitmap cacheBitmap = view.getDrawingCache(); // 将绘图缓存得到的,注意这里得到的只是一个图像的引用
if (cacheBitmap == null)
return failLog(view);
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap); // 将位图实例化
// Restore the view //恢复视图
view.destroyDrawingCache();// 释放位图内存
view.setWillNotCacheDrawing(willNotCache);// 返回以前缓存设置
view.setDrawingCacheBackgroundColor(color);// 返回以前的缓存颜色设置
return bitmap;
}
/**
* Draw the view into a bitmap.
*/
private Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(Color.TRANSPARENT);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
Log.e(TAG, "failed getViewBitmap(" + v + ")", new RuntimeException());
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* Draw the view into a bitmap.
*/
private Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
Log.e(TAG, "failed getViewBitmap(" + v + ")", new RuntimeException());
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* Draw the view into a bitmap.
*/
private Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
Log.e(TAG, "failed getViewBitmap(" + v + ")", new RuntimeException());
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* 把view转化为bitmap(截图)
* 参见:http://www.cnblogs.com/lee0oo0/p/3355468.html
*/
public static Bitmap toBitmap(View view) {
int width = view.getWidth();
int height = view.getHeight();
if (view instanceof ListView) {
height = 0;
// 获取listView实际高度
ListView listView = (ListView) view;
for (int i = 0; i < listView.getChildCount(); i++) {
height += listView.getChildAt(i).getHeight();
}
} else if (view instanceof ScrollView) {
height = 0;
// 获取scrollView实际高度
ScrollView scrollView = (ScrollView) view;
for (int i = 0; i < scrollView.getChildCount(); i++) {
height += scrollView.getChildAt(i).getHeight();
}
}
view.setDrawingCacheEnabled(true);
view.clearFocus();
view.setPressed(false);
boolean willNotCache = view.willNotCacheDrawing();
view.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent for the duration of this operation
int color = view.getDrawingCacheBackgroundColor();
view.setDrawingCacheBackgroundColor(Color.WHITE);//截图去黑色背景(透明像素)
if (color != Color.WHITE) {
view.destroyDrawingCache();
}
view.buildDrawingCache();
Bitmap cacheBitmap = view.getDrawingCache();
if (cacheBitmap == null) {
return null;
}
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawBitmap(cacheBitmap, 0, 0, null);
canvas.save();
canvas.restore();
if (!bitmap.isRecycled()) {
bitmap.recycle();
}
// Restore the view
view.destroyDrawingCache();
view.setWillNotCacheDrawing(willNotCache);
view.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* 把view转化为bitmap(截图)
* 参见:http://www.cnblogs.com/lee0oo0/p/3355468.html
*/
public static Bitmap toBitmap(View view) {
int width = view.getWidth();
int height = view.getHeight();
if (view instanceof ListView) {
height = 0;
// 获取listView实际高度
ListView listView = (ListView) view;
for (int i = 0; i < listView.getChildCount(); i++) {
height += listView.getChildAt(i).getHeight();
}
} else if (view instanceof ScrollView) {
height = 0;
// 获取scrollView实际高度
ScrollView scrollView = (ScrollView) view;
for (int i = 0; i < scrollView.getChildCount(); i++) {
height += scrollView.getChildAt(i).getHeight();
}
}
view.setDrawingCacheEnabled(true);
view.clearFocus();
view.setPressed(false);
boolean willNotCache = view.willNotCacheDrawing();
view.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent for the duration of this operation
int color = view.getDrawingCacheBackgroundColor();
view.setDrawingCacheBackgroundColor(Color.WHITE);//截图去黑色背景(透明像素)
if (color != Color.WHITE) {
view.destroyDrawingCache();
}
view.buildDrawingCache();
Bitmap cacheBitmap = view.getDrawingCache();
if (cacheBitmap == null) {
return null;
}
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawBitmap(cacheBitmap, 0, 0, null);
canvas.save(Canvas.ALL_SAVE_FLAG);
canvas.restore();
if (!bitmap.isRecycled()) {
LogUtils.verbose("recycle bitmap: " + bitmap.toString());
bitmap.recycle();
}
// Restore the view
view.destroyDrawingCache();
view.setWillNotCacheDrawing(willNotCache);
view.setDrawingCacheBackgroundColor(color);
return bitmap;
}
/**
* 把view转化为bitmap(截图)
* 参见:http://www.cnblogs.com/lee0oo0/p/3355468.html
*/
public static Bitmap toBitmap(View view) {
int width = view.getWidth();
int height = view.getHeight();
if (view instanceof ListView) {
height = 0;
// 获取listView实际高度
ListView listView = (ListView) view;
for (int i = 0; i < listView.getChildCount(); i++) {
height += listView.getChildAt(i).getHeight();
}
} else if (view instanceof ScrollView) {
height = 0;
// 获取scrollView实际高度
ScrollView scrollView = (ScrollView) view;
for (int i = 0; i < scrollView.getChildCount(); i++) {
height += scrollView.getChildAt(i).getHeight();
}
}
view.setDrawingCacheEnabled(true);
view.clearFocus();
view.setPressed(false);
boolean willNotCache = view.willNotCacheDrawing();
view.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent for the duration of this operation
int color = view.getDrawingCacheBackgroundColor();
view.setDrawingCacheBackgroundColor(Color.WHITE);//截图去黑色背景(透明像素)
if (color != Color.WHITE) {
view.destroyDrawingCache();
}
view.buildDrawingCache();
Bitmap cacheBitmap = view.getDrawingCache();
if (cacheBitmap == null) {
return null;
}
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawBitmap(cacheBitmap, 0, 0, null);
canvas.save();
canvas.restore();
if (!bitmap.isRecycled()) {
LogUtils.verbose("recycle bitmap: " + bitmap.toString());
bitmap.recycle();
}
// Restore the view
view.destroyDrawingCache();
view.setWillNotCacheDrawing(willNotCache);
view.setDrawingCacheBackgroundColor(color);
return bitmap;
}