//安装apk文件
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private void installAPK(File file) {
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Intent intent = new Intent(Intent.ACTION_VIEW);
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Uri data = Uri.fromFile(file);
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String type = "application/vnd.android.package-archive";
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intent.setDataAndType(data, type);
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startActivity(intent);
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}
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//卸载apk文件
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private void uninstallAPK(String packageName) {
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Intent intent = new Intent(Intent.ACTION_VIEW);
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Uri data = Uri.parse("package:" + packageName);
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intent.setData(data);
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startActivity(intent);
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}
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//编辑图片大小，保持图片不变形。
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public static Bitmap resetImage(Bitmap sourceBitmap,int resetWidth,int resetHeight){
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int width = sourceBitmap.getWidth();
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int height = sourceBitmap.getHeight();
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int tmpWidth;
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int tmpHeight;
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float scaleWidth = (float)resetWidth / (float)width;
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float scaleHeight = (float)resetHeight / (float)height;
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float maxTmpScale = scaleWidth >= scaleHeight ? scaleWidth : scaleHeight;
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//保持不变形
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tmpWidth = (int)(maxTmpScale * width);
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tmpHeight = (int)(maxTmpScale * height);
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Matrix m = new Matrix();
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m.setScale(maxTmpScale, maxTmpScale, tmpWidth, tmpHeight);
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sourceBitmap = Bitmap.createBitmap(sourceBitmap, 0, 0, sourceBitmap.getWidth(), sourceBitmap.getHeight(), m, false);
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//切图
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int x = (tmpWidth - resetWidth)/2;
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int y = (tmpHeight - resetHeight)/2;
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return Bitmap.createBitmap(sourceBitmap, x, y, resetWidth, resetHeight);
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}
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