机器人 - 如何设置图像的ImageView以正确的比例 [英] android - How to set image in ImageView to right proportions

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问题描述

大家好结果
看看下面的图片。结果
我从code belove SD卡加载图像。

我不能让图片自动补ImageView的。我设置的背景颜色为绿色仅仅是为了突出问题。我已经尝试了很多Android:ScaleType像CENTER和FIT_XY但。

林现在使用的inSampleSize = 8,但如何能在ImageView的自动缩放图像是在正确的HIGHT /宽比例和填充屏幕

还有另一件事,你看ExitText和按钮被放置在ImageView的(我认为)以上。
我希望他们能够在不阻止的ImageView。也许我误解了Android布局技术。

DrawView.java

 公共类DrawView扩展了ImageView的{私人上下文CTX;
公共DrawView(上下文的背景下,AttributeSet中的ATT){
    超(背景下,ATT以);
    this.ctx =背景;
}
@覆盖
保护无效的onDraw(帆布油画){
    。字符串文件路径= Environment.getExternalStorageDirectory()的toString()+/PTPPservice/163693fe-7c48-4568-a082-00047123b9f1.2.IMAG2200.jpg
    BitmapFactory.Options选项=新BitmapFactory.Options();
    options.inSampleSize = 8;    位图位图= BitmapFactory.de codeFILE(文件路径,期权);    矩形矩形=新的Rect(0,0,bitmap.getWidth(),bitmap.getHeight());
    canvas.drawBitmap(位图,空,矩形,NULL);
}

}

Main1.xml

<?pre> &LT; XML版本=1.0编码=UTF-8&GT;&LT;的RelativeLayout的xmlns:机器人=htt​​p://schemas.android.com/apk / RES / Android的
    机器人:layout_width =FILL_PARENT
    机器人:layout_height =FILL_PARENT&GT;&LT; com.hasse.move.DrawView
    机器人:ID =@ + ID / MAINVIEW
    机器人:layout_width =FILL_PARENT
    机器人:layout_height =FILL_PARENT
    机器人:layout_alignParentTop =真
    机器人:背景=#00FF00
    机器人:adjustViewBounds =真
  /&GT;
   &LT; RelativeLayout的
    机器人:ID =@ + ID / InnerRelativeLayout
    机器人:layout_width =WRAP_CONTENT
    机器人:layout_height =WRAP_CONTENT
    机器人:layout_alignParentBottom =真正的&GT;
   &LT;的EditText
    机器人:ID =@ + ID / edittextaddtext
    机器人:layout_width =FILL_PARENT
    机器人:layout_toLeftOf =@ + ID / btnsave
    机器人:layout_height =WRAP_CONTENT
    机器人:文字=包装
   /&GT;
   &LT;按钮
    机器人:ID =@ + ID / btnsave
    机器人:layout_alignParentRight =真
    机器人:layout_width =WRAP_CONTENT
    机器人:layout_height =WRAP_CONTENT
    机器人:文字=拯救
   /&GT;
   &LT; / RelativeLayout的&GT;
 &LT; / RelativeLayout的&GT;

主要活动

 公共类主要活动扩展{    DrawView theImage;
    / **当第一次创建活动调用。 * /
    @覆盖
    公共无效的onCreate(捆绑savedInstanceState){
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        //绘制视图
        的setContentView(R.layout.main1);        theImage =(DrawView)findViewById(R.id.mainView);
        //做的东西
    }
    @覆盖
    公共无效onConfigurationChanged(配置NEWCONFIG)
    {
    // Toast.makeText(这一点,onConfigurationChanged,Toast.LENGTH_LONG).show();
        super.onConfigurationChanged(NEWCONFIG);
    }
}


解决方案

在这里,您正在使用的目标矩形要加载的​​位图,而不是画布全尺寸的大小:矩形RECT =新矩形(0,0,bitmap.getWidth(),bitmap.getHeight());

您需要找出你的画布的大小。对于您可以使用onSizeChanged:

  @覆盖
公共无效onSizeChanged(INT W,INT小时,INT oldw,诠释oldh){
  super.onSizeChanged(W,H,oldw,oldh);  screenW = W;
  screenH = H;
}

hi all
Look at the picture below.
I'm loading an image from sdcard with code belove.

I cannot get the picture to automatically fill the ImageView. I set the background to color green only to highlight the problem. I have tried many android:ScaleType like CENTER and FIT_XY but.

Im now using inSampleSize = 8 but how can the ImageView automatically scale the image to be in the right hight/width proportions and fill the screen

Also another thing, You see the ExitText and Button is placed above the Imageview(I think). I want them to be under and not block the ImageView. Maybe i misunderstand the android layout technical.

DrawView.java

public class DrawView extends ImageView {

private Context ctx;
public DrawView(Context context, AttributeSet atts) {
    super(context, atts);
    this.ctx = context;
} 
@Override 
protected void onDraw(Canvas canvas) {
    String filePath = Environment.getExternalStorageDirectory().toString() + "/PTPPservice/163693fe-7c48-4568-a082-00047123b9f1.2.IMAG2200.jpg";
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inSampleSize = 8;

    Bitmap bitmap = BitmapFactory.decodeFile(filePath,options);     

    Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    canvas.drawBitmap(bitmap, null, rect,null);
}

}

Main1.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

<com.hasse.move.DrawView 
    android:id="@+id/mainView"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_alignParentTop="true"
    android:background="#00FF00"
    android:adjustViewBounds="true"
  />
   <RelativeLayout 
    android:id="@+id/InnerRelativeLayout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true" >
   <EditText 
    android:id="@+id/edittextaddtext"
    android:layout_width="fill_parent"
    android:layout_toLeftOf="@+id/btnsave"
    android:layout_height="wrap_content"
    android:text="wrap"
   />
   <Button 
    android:id="@+id/btnsave" 
    android:layout_alignParentRight="true" 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="save"
   />
   </RelativeLayout>
 </RelativeLayout>

Main Activity

public class Main extends Activity {

    DrawView theImage;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        // draw the view
        setContentView(R.layout.main1);

        theImage = (DrawView) findViewById(R.id.mainView);
        //do stuff
    }
    @Override
    public void onConfigurationChanged(Configuration newConfig)
    {
    //  Toast.makeText(this, "onConfigurationChanged",Toast.LENGTH_LONG).show();
        super.onConfigurationChanged(newConfig);
    }
}

解决方案

Here you are using the destination rectangle to be the size of the loaded bitmap instead of the full size of canvas: Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());

You need to find out the size of your canvas. For that you can use onSizeChanged:

@Override
public void onSizeChanged (int w, int h, int oldw, int oldh){
  super.onSizeChanged(w, h, oldw, oldh);

  screenW = w;
  screenH = h;
}

这篇关于机器人 - 如何设置图像的ImageView以正确的比例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!

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