保存在android的fingerPaint API演示由用户图像 [英] Save the image made by user in fingerPaint api demos in android
本文介绍了保存在android的fingerPaint API演示由用户图像的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
嘿，伙计们 我想建立一个签名任务的应用程序。 在其中用户将创建触摸的签名和该位图应保存在手机中。 我创建了具有自定义视图一样之一fingerpaint应用，并呼吁main.xml中的文件的视图2类文件之一。
在我的主应用程序类文件，我有菜单按钮，在点击保存位图的SD卡。以下是code： -
包org.testCircle;
进口android.app.Activity;
进口android.graphics.Bitmap;
进口android.graphics.Canvas;
进口android.os.Bundle;
进口android.provider.MediaStore.Images;
进口android.view.Menu;
进口android.view.MenuItem;
进口android.widget.TextView;
进口android.widget.Toast;
公共类testCircle延伸活动{
TextView的电视;
/ **第一次创建活动时调用。 * /
@覆盖
公共无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
//的setContentView（新customView（本））;
的setContentView（R.layout.main）;
}
公共布尔onCreateOptionsMenu（功能菜单）{
super.onCreateOptionsMenu（菜单）;
menu.add（0，1，0，保存）setShortcut（'3'，'c'）中。
返回true;
}
公共布尔prepareOptionsMenu（功能菜单）在{
super.on prepareOptionsMenu（菜单）;
返回true;
}
@覆盖
公共布尔onOptionsItemSelected（菜单项项）{
开关（item.getItemId（））{
情况1：
//新ColorPickerDialog（这个，这个，mPaint.getColor（））显示（）。
fingerPaint CV =新fingerPaint（本）;
位图viewBitmap = Bitmap.createBitmap（480，800，Bitmap.Config.ARGB_8888）;
帆布油画=新的Canvas（viewBitmap）;
cv.draw（画布）;
字符串URL = Images.Media.insertImage（getContentResolver（），viewBitmap，称号，空）;
Toast.makeText（testCircle.this，网址，Toast.LENGTH_LONG）.show（）;
返回true;
}
返回super.onOptionsItemSelected（项目）;
}
}
自定义视图： -
包org.testCircle;
进口android.content.Context;
进口android.graphics.Bitmap;
进口android.graphics.Canvas;
进口android.graphics.Paint;
进口android.graphics.Path;
进口android.os.Bundle;
进口android.util.AttributeSet;
进口android.view.MotionEvent;
进口android.view.View;
公共类fingerPaint扩展视图{
涂料mPaint;
私有静态最终浮动MINP = 0.25f;
私有静态最终浮动MAXP = 0.75f;
私有静态位图mBitmap;
私人帆布mCanvas;
私人路径的mpath;
私人油漆mBitmapPaint;
公共fingerPaint（上下文C）{
超级（C）;
mPaint =新的油漆（）;
mPaint.setAntiAlias（真正的）;
mPaint.setDither（真正的）;
mPaint.setColor（0xFFFF0000地址）;
mPaint.setStyle（Paint.Style.STROKE）;
mPaint.setStrokeJoin（Paint.Join.ROUND）;
mPaint.setStrokeCap（Paint.Cap.ROUND）;
mPaint.setStrokeWidth（12）;
mBitmap = Bitmap.createBitmap（320，480，Bitmap.Config.ARGB_8888）;
mCanvas =新的Canvas（mBitmap）;
的mpath =新路径（）;
mBitmapPaint =新的油漆（Paint.DITHER_FLAG）;
}
公共fingerPaint（上下文C，AttributeSet中的ATTRS）{
超级（C，ATTRS）;
mPaint =新的油漆（）;
mPaint.setAntiAlias（真正的）;
mPaint.setDither（真正的）;
mPaint.setColor（0xFFFF0000地址）;
mPaint.setStyle（Paint.Style.STROKE）;
mPaint.setStrokeJoin（Paint.Join.ROUND）;
mPaint.setStrokeCap（Paint.Cap.ROUND）;
mPaint.setStrokeWidth（12）;
mBitmap = Bitmap.createBitmap（320，480，Bitmap.Config.ARGB_8888）;
mCanvas =新的Canvas（mBitmap）;
的mpath =新路径（）;
mBitmapPaint =新的油漆（Paint.DITHER_FLAG）;
}
公共无效onerase（）{
mCanvas = NULL;
}
@覆盖
保护无效onSizeChanged（INT W，INT小时，INT oldw，诠释oldh）{
super.onSizeChanged（W，H，oldw，oldh）;
}
@覆盖
保护无效的OnDraw（帆布油画）{
canvas.drawColor（0xFFAAAAAA）;
canvas.drawBitmap（mBitmap，0，0，mBitmapPaint）;
canvas.drawPath（的mpath，mPaint）;
}
私人浮动MX，我的;
私有静态最终浮动TOUCH_TOLERANCE = 4;
私人无效touch_start（浮X，浮动Y）{
mPath.reset（）;
mPath.moveTo（X，Y）;
MX = X;
我= Y;
}
私人无效TOUCH_MOVE（浮X，浮动Y）{
浮DX = Math.abs（X - MX）;
浮DY = Math.abs（Y - 我的）;
如果（DX＆GT; = TOUCH_TOLERANCE || DY＆GT; = TOUCH_TOLERANCE）{
mPath.quadTo（MX，MY，（X + MX）/ 2，（Y +我）/ 2）;
MX = X;
我= Y;
}
mCanvas.drawBitmap（mBitmap，MX，我，mPaint）;
}
私人无效touch_up（）{
mPath.lineTo（MX，MY）;
//提交路径，我们的屏幕外
mCanvas.drawPath（的mpath，mPaint）;
//杀了这个，所以我们不重复抽奖
mPath.reset（）;
}
@覆盖
公共布尔的onTouchEvent（MotionEvent事件）{
浮X = event.getX（）;
浮动Y = event.getY（）;
开关（event.getAction（））{
案例MotionEvent.ACTION_DOWN：
touch_start（X，Y）;
无效（）;
打破;
案例MotionEvent.ACTION_MOVE：
TOUCH_MOVE（X，Y）;
无效（）;
打破;
案例MotionEvent.ACTION_UP：
润色（）;
无效（）;
叠B =新包（）;
打破;
}
返回true;
}
}
解决方案
下面是源$ C $ C要做到这一点
的LinearLayout V =（的LinearLayout）findViewById（R.id.mainLayout）;
v.setDrawingCacheEnabled（真正的）;
//这是最重要的code :)
//如果没有它的视图将有一个
// 0,0尺寸，将位图
//为空
v.measure（MeasureSpec.makeMeasureSpec（0，MeasureSpec.UNSPECIFIED），MeasureSpec.makeMeasureSpec（0，MeasureSpec.UNSPECIFIED））;
v.layout（0，0，v.getWidth（），v.getHeight（））;
v.buildDrawingCache（真正的）;
位图BM = Bitmap.createBitmap（v.getDrawingCache（））;
v.setDrawingCacheEnabled（假）;
如果（BM！= NULL）{
尝试 {
。字符串路径= Environment.getExternalStorageDirectory（）的toString（）;
OutputStream的FOUT = NULL;
档案文件=新的文件（路径，screentest.jpg）;
FOUT =新的FileOutputStream（文件）;
bm.com preSS（Bitmap.Com pressFormat.JPEG，85，FOUT）;
fOut.flush（）;
fOut.close（）;
Log.e（的ImagePath，映像路径：+ MediaStore.Images.Media.insertImage（getContentResolver（），file.getAbsolutePath（），file.getName（），file.getName（）））;
}
赶上（例外五）{
e.printStackTrace（）;
}
}
希望这将与您一起还。
Hey guys I am trying to build a signature task application . In which the user will create the signature on touch and that bitmap should be saved in the phone. I have created 2 class files one having the custom view the same as the one in fingerpaint application and calling the view in main.xml file.
In my main application class file i have menu button which on click saves the bitmap in sdcard . The following is the code :-
package org.testCircle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.os.Bundle;
import android.provider.MediaStore.Images;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;
public class testCircle extends Activity {
TextView tv;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(new customView(this));
setContentView(R.layout.main);
}
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, 1, 0, "save").setShortcut('3', 'c');
return true;
}
public boolean onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case 1:
//new ColorPickerDialog(this, this, mPaint.getColor()).show();
fingerPaint cv = new fingerPaint(this);
Bitmap viewBitmap = Bitmap.createBitmap(480, 800,Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(viewBitmap);
cv.draw(canvas);
String url = Images.Media.insertImage(getContentResolver(), viewBitmap, "title", null);
Toast.makeText(testCircle.this, url, Toast.LENGTH_LONG).show();
return true;
}
return super.onOptionsItemSelected(item);
}
}
Custom View :-
package org.testCircle;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.os.Bundle;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
public class fingerPaint extends View {
Paint mPaint;
private static final float MINP = 0.25f;
private static final float MAXP = 0.75f;
private static Bitmap mBitmap;
private Canvas mCanvas;
private Path mPath;
private Paint mBitmapPaint;
public fingerPaint(Context c) {
super(c);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(0xFFFF0000);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(12);
mBitmap = Bitmap.createBitmap(320, 480, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
}
public fingerPaint(Context c , AttributeSet attrs){
super(c , attrs);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(0xFFFF0000);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(12);
mBitmap = Bitmap.createBitmap(320, 480, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
}
public void onerase(){
mCanvas=null;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawColor(0xFFAAAAAA);
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
canvas.drawPath(mPath, mPaint);
}
private float mX, mY;
private static final float TOUCH_TOLERANCE = 4;
private void touch_start(float x, float y) {
mPath.reset();
mPath.moveTo(x, y);
mX = x;
mY = y;
}
private void touch_move(float x, float y) {
float dx = Math.abs(x - mX);
float dy = Math.abs(y - mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
mX = x;
mY = y;
}
mCanvas.drawBitmap(mBitmap, mX, mY, mPaint);
}
private void touch_up() {
mPath.lineTo(mX, mY);
// commit the path to our offscreen
mCanvas.drawPath(mPath, mPaint);
// kill this so we don't double draw
mPath.reset();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
touch_start(x, y);
invalidate();
break;
case MotionEvent.ACTION_MOVE:
touch_move(x, y);
invalidate();
break;
case MotionEvent.ACTION_UP:
touch_up();
invalidate();
Bundle b = new Bundle();
break;
}
return true;
}
}
解决方案
Here is the source code to do that
LinearLayout v = (LinearLayout) findViewById(R.id.mainLayout);
v.setDrawingCacheEnabled(true);
// this is the important code :)
// Without it the view will have a
// dimension of 0,0 and the bitmap will
// be null
v.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
v.layout(0, 0, v.getWidth(), v.getHeight());
v.buildDrawingCache(true);
Bitmap bm = Bitmap.createBitmap(v.getDrawingCache());
v.setDrawingCacheEnabled(false);
if (bm != null) {
try {
String path = Environment.getExternalStorageDirectory().toString();
OutputStream fOut = null;
File file = new File(path, "screentest.jpg");
fOut = new FileOutputStream(file);
bm.compress(Bitmap.CompressFormat.JPEG, 85, fOut);
fOut.flush();
fOut.close();
Log.e("ImagePath", "Image Path : " + MediaStore.Images.Media.insertImage( getContentResolver(), file.getAbsolutePath(), file.getName(), file.getName()));
}
catch (Exception e) {
e.printStackTrace();
}
}
Hope this will work with you also.
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