两项活动之间传递位图 [英] Passing Bitmap between two activities
问题描述
我开发一个应用程序的绘画中,我想从一个活动传递一个位图图像到另一个,但项目没有响应。我转换相对布局截图成位图,并通过意图传递给它,但问题并没有解决。这是我的code ....
DrawingActivity
包com.newdrawing;
公共类DrawingActivity延伸活动{
私人位图mBitmap;
私人帆布mCanvas;
私人路径的mpath;
私人油漆mBitmapPaint;
私人油漆mPaint;
MyDrawView myDrawView;
RelativeLayout的父母;
点阵位图;
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_drawing);
父=(RelativeLayout的)findViewById(R.id.singleparent);
myDrawView =新MyDrawView(本);
parent.addView(myDrawView);
活动范围内;
// RelativeLayout的项目=(RelativeLayout的)findViewById(R.id.item);
查看孩子= getLayoutInflater()膨胀(R.layout.trans,空)。
parent.addView(子);
}
公共无效颜色(视图v){
开关(v.getId()){
案例R.id.button3:
parent.setBackgroundColor(Color.RED);
打破;
案例R.id.button4:
parent.setBackgroundColor(Color.GREEN);
打破;
案例R.id.button5:
parent.setBackgroundColor(Color.BLUE);
打破;
}
}
公共无效保存(视图v){
parent.setDrawingCacheEnabled(真正的);
位图= parent.getDrawingCache();
parent.setDrawingCacheEnabled(假);
Log.e(位图,将String.valueOf(位图));
// 发送();
//帆布C =新的Canvas(位);
//.draw(c);
//文件OUTPUTFILE; //保存位置
// FileOutputStream中出=新的FileOutputStream(镜像文件);
//布尔型成功= bitmap.com preSS(比较pressFormat.PNG,100,出);
// out.close();
意图I =新的意图(这一点,ImageActivity.class);
ByteArrayOutputStream BS =新ByteArrayOutputStream();
bitmap.com preSS(Bitmap.Com pressFormat.PNG,50,BS);
字节[]的字节数组= bs.toByteArray();
i.putExtra(的字节数组,字节);
startActivity(ⅰ);
}
私人无效的send()
{
意图I9 =新的意图(DrawingActivity.this,ImageActivity.class);
i9.putExtra(图像,位图);
startActivity(I9);
}
@覆盖
公共布尔onCreateOptionsMenu(功能菜单){
。getMenuInflater()膨胀(R.menu.activity_drawing,菜单);
返回true;
}
公共类MyDrawView扩展视图{
公共MyDrawView(上下文C){
超级(C);
的mpath =新路径();
mBitmapPaint =新的油漆(Paint.DITHER_FLAG);
mPaint =新的油漆();
mPaint.setAntiAlias(真正的);
mPaint.setDither(真正的);
mPaint.setColor(0xFF000000);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(3);
}
@覆盖
保护无效onSizeChanged(INT W,INT小时,INT oldw,诠释oldh){
super.onSizeChanged(W,H,oldw,oldh);
mBitmap = Bitmap.createBitmap(W,H,Bitmap.Config.ARGB_8888);
mCanvas =新的Canvas(mBitmap);
}
@覆盖
保护无效的OnDraw(帆布油画){
canvas.drawBitmap(mBitmap,0,0,mBitmapPaint);
canvas.drawColor(Color.TRANSPARENT);
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> = TOUCH_TOLERANCE || DY> = TOUCH_TOLERANCE){
mPath.quadTo(MX,MY,(X + MX)/ 2,(Y +我)/ 2);
MX = X;
我= Y;
}
}
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();
打破;
}
返回true;
}
公共无效清除(){
mBitmap.eraseColor(Color.TRANSPARENT);
无效();
System.gc()的;
}
}
}
ImageActivity
包com.newdrawing;
公共类ImageActivity延伸活动{
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_image);
意图I = getIntent();
ImageView的IMG =(ImageView的)findViewById(R.id.image11);
/ *
如果(getIntent()。hasExtra(的字节数组))
{
位图B = BitmapFactory.de codeByteArray(
。getIntent()getByteArrayExtra(的字节数组),0,getIntent()getByteArrayExtra(的字节数组)的长度)。;
img.setImageBitmap(B);
Log.e(位图,将String.valueOf(b))的;
} * /
捆绑额外= getIntent()getExtras()。
字节[]的字节数组= extras.getByteArray(的字节数组);
BMP位= BitmapFactory.de codeByteArray(字节数组,0,byteArray.length);
img.setImageBitmap(BMP);
}
@覆盖
公共布尔onCreateOptionsMenu(功能菜单){
。getMenuInflater()膨胀(R.menu.activity_image,菜单);
返回true;
}
}
要价较高报告
10月10日至16号:39:22.653:E / AndroidRuntime(339):致命异常:主要
10月10号至16日:39:22.653:E / AndroidRuntime(339):java.lang.IllegalStateException:无法执行活动的方法
10月10号至16日:39:22.653:E / AndroidRuntime(339):在android.view.View $ 1.onClick(View.java:2072)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在android.view.View.performClick(View.java:2408)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在android.view.View $ PerformClick.run(View.java:8816)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在android.os.Handler.handleCallback(Handler.java:587)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在android.os.Handler.dispatchMessage(Handler.java:92)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在android.os.Looper.loop(Looper.java:123)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在android.app.ActivityThread.main(ActivityThread.java:4627)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在java.lang.reflect.Method.invokeNative(本机方法)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在java.lang.reflect.Method.invoke(Method.java:521)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:868)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在dalvik.system.NativeStart.main(本机方法)
10月10号至16日:39:22.653:E / AndroidRuntime(339):由:java.lang.reflect.InvocationTargetException
10月10号至16日:39:22.653:E / AndroidRuntime(339):在com.newdrawing.DrawingActivity.save(DrawingActivity.java:91)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在java.lang.reflect.Method.invokeNative(本机方法)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在java.lang.reflect.Method.invoke(Method.java:521)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在android.view.View $ 1.onClick(View.java:2067)
10月10号至16日:39:22.653:E / AndroidRuntime(339):11 ...更多
10月10号至16日:39:22.653:E / AndroidRuntime(339):java.lang.IllegalStateException:产生的原因无法COM preSS再循环的位图
10月10号至16日:39:22.653:E / AndroidRuntime(339):在android.graphics.Bitmap.checkRecycled(Bitmap.java:180)
10月10号至16日:39:22.653:E / AndroidRuntime(339):在android.graphics.Bitmap.com preSS(Bitmap.java:572)
10月10号至16日:39:22.653:E / AndroidRuntime(339):15 ...更多
您可以简单地尝试下面 -
意向书我=新的意图(这一点,Second.class)
i.putExtra(图像,位图);
startActivity㈠
和,在 Second.class
位图位=(位图)intent.getParcelableExtra(图像);
有一个在这里 如果你想COM preSS你的位图
发送到下一个活动之前,只要看看下面 -
意向书我=新的意图(这一点,NextActivity.class);
位图B: //位图
ByteArrayOutputStream BS =新ByteArrayOutputStream();
b.com preSS(Bitmap.Com pressFormat.PNG,50,BS);
i.putExtra(的字节数组,bs.toByteArray());
startActivity(ⅰ);
在你的nextactivity -
如果(getIntent()。hasExtra(的字节数组)){
ImageView的previewThumbnail =新ImageView的(这一点);
位图B = BitmapFactory.de codeByteArray(
。getIntent()getByteArrayExtra(的字节数组),0,getIntent()getByteArrayExtra(的字节数组)的长度)。;
previewThumbnail.setImageBitmap(B);
}
I am developing a painting app in which i want to pass a Bitmap image from one activity to another but the project is not responding. I converted the relative layout screenshot into a bitmap and passing it through Intent but the problem is not solved. Here is my code....
DrawingActivity
package com.newdrawing;
public class DrawingActivity extends Activity {
private Bitmap mBitmap;
private Canvas mCanvas;
private Path mPath;
private Paint mBitmapPaint;
private Paint mPaint;
MyDrawView myDrawView;
RelativeLayout parent;
Bitmap bitmap;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_drawing);
parent = (RelativeLayout) findViewById(R.id.singleparent);
myDrawView = new MyDrawView(this);
parent.addView(myDrawView);
Activity context;
//RelativeLayout item = (RelativeLayout)findViewById(R.id.item);
View child = getLayoutInflater().inflate(R.layout.trans, null);
parent.addView(child);
}
public void color(View v) {
switch (v.getId()) {
case R.id.button3:
parent.setBackgroundColor(Color.RED);
break;
case R.id.button4:
parent.setBackgroundColor(Color.GREEN);
break;
case R.id.button5:
parent.setBackgroundColor(Color.BLUE);
break;
}
}
public void save(View v) {
parent.setDrawingCacheEnabled(true);
bitmap=parent.getDrawingCache();
parent.setDrawingCacheEnabled(false);
Log.e("Bitmap",String.valueOf(bitmap));
// send();
//Canvas c = new Canvas(bitmap);
//.draw(c);
// File outputFile; // Where to save it
//FileOutputStream out = new FileOutputStream(imageFile);
// boolean success = bitmap.compress(CompressFormat.PNG, 100, out);
// out.close();
Intent i = new Intent(this, ImageActivity.class);
ByteArrayOutputStream bs = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 50, bs);
byte[] byteArray = bs.toByteArray();
i.putExtra("byteArray", byteArray);
startActivity(i);
}
private void send()
{
Intent i9=new Intent(DrawingActivity.this,ImageActivity.class);
i9.putExtra("Image",bitmap);
startActivity(i9);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_drawing, menu);
return true;
}
public class MyDrawView extends View {
public MyDrawView(Context c) {
super(c);
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(0xFF000000);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(3);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
canvas.drawColor(Color.TRANSPARENT);
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;
}
}
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();
break;
}
return true;
}
public void clear(){
mBitmap.eraseColor(Color.TRANSPARENT);
invalidate();
System.gc();
}
}
}
ImageActivity
package com.newdrawing;
public class ImageActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image);
Intent i = getIntent();
ImageView img=(ImageView)findViewById(R.id.image11);
/*
if(getIntent().hasExtra("byteArray"))
{
Bitmap b = BitmapFactory.decodeByteArray(
getIntent().getByteArrayExtra("byteArray"),0,getIntent().getByteArrayExtra("byteArray").length);
img.setImageBitmap(b);
Log.e("Bitmap",String.valueOf(b));
}*/
Bundle extras = getIntent().getExtras();
byte[] byteArray = extras.getByteArray("byteArray");
Bitmap bmp = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
img.setImageBitmap(bmp);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_image, menu);
return true;
}
}
Locat Report
10-16 10:39:22.653: E/AndroidRuntime(339): FATAL EXCEPTION: main
10-16 10:39:22.653: E/AndroidRuntime(339): java.lang.IllegalStateException: Could not execute method of the activity
10-16 10:39:22.653: E/AndroidRuntime(339): at android.view.View$1.onClick(View.java:2072)
10-16 10:39:22.653: E/AndroidRuntime(339): at android.view.View.performClick(View.java:2408)
10-16 10:39:22.653: E/AndroidRuntime(339): at android.view.View$PerformClick.run(View.java:8816)
10-16 10:39:22.653: E/AndroidRuntime(339): at android.os.Handler.handleCallback(Handler.java:587)
10-16 10:39:22.653: E/AndroidRuntime(339): at android.os.Handler.dispatchMessage(Handler.java:92)
10-16 10:39:22.653: E/AndroidRuntime(339): at android.os.Looper.loop(Looper.java:123)
10-16 10:39:22.653: E/AndroidRuntime(339): at android.app.ActivityThread.main(ActivityThread.java:4627)
10-16 10:39:22.653: E/AndroidRuntime(339): at java.lang.reflect.Method.invokeNative(Native Method)
10-16 10:39:22.653: E/AndroidRuntime(339): at java.lang.reflect.Method.invoke(Method.java:521)
10-16 10:39:22.653: E/AndroidRuntime(339): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-16 10:39:22.653: E/AndroidRuntime(339): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-16 10:39:22.653: E/AndroidRuntime(339): at dalvik.system.NativeStart.main(Native Method)
10-16 10:39:22.653: E/AndroidRuntime(339): Caused by: java.lang.reflect.InvocationTargetException
10-16 10:39:22.653: E/AndroidRuntime(339): at com.newdrawing.DrawingActivity.save(DrawingActivity.java:91)
10-16 10:39:22.653: E/AndroidRuntime(339): at java.lang.reflect.Method.invokeNative(Native Method)
10-16 10:39:22.653: E/AndroidRuntime(339): at java.lang.reflect.Method.invoke(Method.java:521)
10-16 10:39:22.653: E/AndroidRuntime(339): at android.view.View$1.onClick(View.java:2067)
10-16 10:39:22.653: E/AndroidRuntime(339): ... 11 more
10-16 10:39:22.653: E/AndroidRuntime(339): Caused by: java.lang.IllegalStateException: Can't compress a recycled bitmap
10-16 10:39:22.653: E/AndroidRuntime(339): at android.graphics.Bitmap.checkRecycled(Bitmap.java:180)
10-16 10:39:22.653: E/AndroidRuntime(339): at android.graphics.Bitmap.compress(Bitmap.java:572)
10-16 10:39:22.653: E/AndroidRuntime(339): ... 15 more
You can simply try with below -
Intent i = new Intent(this, Second.class)
i.putExtra("Image", bitmap);
startActivity(i)
And, in Second.class
Bitmap bitmap = (Bitmap) intent.getParcelableExtra("Image");
Have a look at here If you want to compress your Bitmap
before sending to next activity just have a look at below -
Intent i = new Intent(this, NextActivity.class);
Bitmap b; // your bitmap
ByteArrayOutputStream bs = new ByteArrayOutputStream();
b.compress(Bitmap.CompressFormat.PNG, 50, bs);
i.putExtra("byteArray", bs.toByteArray());
startActivity(i);
in your nextactivity -
if(getIntent().hasExtra("byteArray")) {
ImageView previewThumbnail = new ImageView(this);
Bitmap b = BitmapFactory.decodeByteArray(
getIntent().getByteArrayExtra("byteArray"),0,getIntent().getByteArrayExtra("byteArray").length);
previewThumbnail.setImageBitmap(b);
}
这篇关于两项活动之间传递位图的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!