Android中图片处理(压缩-保存-显示-截屏-视图View转为图片Bitmap)函数工具类

示例：void shareShotScreen() LinearLayout layout = (LinearLayout) findViewById(R.id.plan_layout);Bitmap bitmap = ImageUtils.convertBitmap(layout);String path = ImageUtils.saveImage25(bitmap);ShareUtils.ShareImage(this, share plan, slim plan, share slim plan., path);package com.xikang.android.slimcoach.utils;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import com.xikang.android.slimcoach.Conf;import android.app.Activity;import android.content.ContentResolver;import android.content.Context;import android.database.Cursor;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.BitmapFactory.Options;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Matrix;import .Uri;import vider.MediaStore;import android.text.Layout;import android.util.FloatMath;import android.util.Log;import android.view.Display;import android.view.View;import android.view.View.MeasureSpec;import android.widget.ImageView;import android.widget.Toast;public class ImageUtils private static final String TAG = ImageUtils;public static Bitmap loadImage(Activity activity, ImageView imageView, Uri uri) if (Conf.INFO)Log.i(TAG, loadImage: local uri = + uri);if (uri != null & !uri.toString().startsWith(content:/) return null;Bitmap bitmap = null;try / MediaStoreString pojo = MediaStore.Images.Media.DATA ;Cursor cursor = activity.managedQuery(uri, pojo, null, null, null);if (cursor != null & cursor.moveToFirst() ContentResolver cr = activity.getContentResolver();int colunm_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);String path = cursor.getString(colunm_index);if (Conf.INFO)Log.i(TAG, loadImage: path = + path);if (path.endsWith(.jpg) | path.endsWith(.png) /bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri);bitmap = getCompredBitmap(path);/ imageView.setImageBitmap(getBitmap(path, 100, 200);imageView.setImageBitmap(bitmap); else Toast.makeText(activity, Please select image.,Toast.LENGTH_SHORT).show(); catch (Exception e) e.printStackTrace();return bitmap;public static Bitmap getCompredBitmap(String srcPath) return compressDef(getResizeBitmap(srcPath);/* * get bitmap compressed to 100kb * * param bitmap * return */public static Bitmap getCompredDefBitmap(Bitmap bitmap) return getCompredBitmap(bitmap, 100);/* * get bitmap compressed * * param bitmap * param target_size * unit is kb * return */public static Bitmap getCompredBitmap(Bitmap bitmap, int target_size) return compress(bitmap, target_size);private static Bitmap compressDef(Bitmap bitmap) return compress(bitmap, 100);/* * The cycle compression specify meet the specified target size(100kb) * * param bitmap * param target_size * unit is kb * return */private static Bitmap compress(Bitmap bitmap, int target_size) ByteArrayOutputStream baos = new ByteArrayOutputStream();press(Bitmap.CompressFormat.JPEG, 100, baos);int quality = 100;int length = baos.toByteArray().length / 1024;if (Conf.INFO)Log.i(TAG, compress: length = + length + kb, target_size = + target_size + kb);/ The cycle compression specify meet the specified sizewhile (length target_size) baos.reset();quality -= 10;press(Bitmap.CompressFormat.JPEG, quality, baos);length = baos.toByteArray().length / 1024;if (!bitmap.isRecycled() bitmap.recycle();byte data = baos.toByteArray();int cp_length = data.length;Log.i(TAG, compressed image length = + cp_length / 1024 + kb);return BitmapFactory.decodeByteArray(data, 0, cp_length);/* * change image size: width and height * * param options * return */private static int getSimpleSize(BitmapFactory.Options options) int w = options.outWidth;int h = options.outHeight;float hh = 800f;float ww = 480f;int scale = 1;if (w h & w ww) scale = (int) (options.outWidth / ww); else if (w hh) scale = (int) (options.outHeight / hh);if (scale yScale ? xScale : yScale;op.inJustDecodeBounds = false;bmp = BitmapFactory.decodeFile(path, op);return bmp;public static Bitmap getBitmap2(String path, int width, int height) BitmapFactory.Options op = new BitmapFactory.Options();op.inJustDecodeBounds = true;Bitmap bmp = BitmapFactory.decodeFile(path, op);/ 编码后bitmap的宽高,bitmap除以屏幕宽度得到压缩比int widthRatio = (int) FloatMath.ceil(op.outWidth / (float) width);int heightRatio = (int) FloatMath.ceil(op.outHeight / (float) height);if (widthRatio 1 & heightRatio 1) if (widthRatio heightRatio) / 压缩到原来的(1/widthRatios)op.inSampleSize = widthRatio; else op.inSampleSize = heightRatio;op.inJustDecodeBounds = false;bmp = BitmapFactory.decodeFile(path, op);return bmp;/* * 截取可见屏幕部分视图 * param activity * return */public static Bitmap shotScreen(Activity activity) View view = activity.getWindow().getDecorView();Display display = activity.getWindowManager().getDefaultDisplay();view.layout(0, 0, display.getWidth(), display.getHeight();/ 允许当前窗口保存缓存信息，这样getDrawingCache()方法才会返回一个Bitmapview.setDrawingCacheEnabled(true);Bitmap bmp = Bitmap.createBitmap(view.getDrawingCache();return bmp;/* * 截取view的根层可见屏幕部分的视图 * param activity * return */public static Bitmap getRootViewBitmap(View view) return shotViewBitmap(view.getRootView();/* * 截取可见屏幕部分的view视图 * param activity * return */public static Bitmap shotViewBitmap(View v) v.clearFocus(); v.setPressed(false); Bitmap bmp = null; try v.layout(0, 0, v.getWidth(), v.getHeight(); / 允许当前窗口保存缓存信息，这样getDrawingCache()方法才会返回一个Bitmap v.setDrawingCacheEnabled(true); v.buildDrawingCache(); bmp = Bitmap.createBitmap(v.getDrawingCache(); catch (Exception e) e.printStackTrace();return bmp;/* * convert view to integral bitmap and return it * 获取view的完整视图图片（即使没有显示出来的部分） * param view : view or layout * return */public static Bitmap convertBitmap(View view) return convertViewToBitmap(view, view.getWidth(), view.getHeight();/* * convert measured view to integral bitmap and return it * 通过计算的方法宽高后，