Question

我有 splash.png ，并希望此图片在屏幕上显示fitXY ImageView public class BitmapConfigView extends LinearLayout { private Bitmap mImage; private Paint mPaint = new Paint(); public BitmapConfigView(Context context) { super(context); BitmapFactory.Options opts = new BitmapFactory.Options(); opts.inPreferredConfig = Bitmap.Config.ARGB_8888; opts.inScaled = false; mImage = BitmapFactory.decodeResource( getResources(), R.drawable.splash, opts); mPaint.setDither(true); setWillNotDraw(false); setOrientation(VERTICAL); setGravity(Gravity.BOTTOM); } @Override protected void onDraw(Canvas canvas) { canvas.drawBitmap(mImage, 0.0f, 0.0f, mPaint); } }。 splash.png 的尺寸为480x767。

我必须在代码中更改哪些内容？

{{1}}

Answer 1

缩放位图。这就是你要找的东西：
android.graphics.Bitmap.createScaledBitmap

Answer 2

这就是我通常采用比例法的方法。

public Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) {

int width = bm.getWidth();

int height = bm.getHeight();

float scaleWidth = ((float) newWidth) / width;

float scaleHeight = ((float) newHeight) / height;

// create a matrix for the manipulation

Matrix matrix = new Matrix();

// resize the bit map
    matrix.postScale(scaleWidth, scaleHeight);   
// recreate the new Bitmap

Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height, matrix, false);

return resizedBitmap;

}

Answer 3

因此，我使用了WebView：

public class TestwebViewimageActivity extends Activity {
private WebView wv;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    wv = (WebView) findViewById(R.id.webview);
    wv.setWebViewClient(new HelloWebViewClient());  
    wv.setBackgroundColor(0x00000000);
    wv.getSettings().setBuiltInZoomControls(false);
    wv.setVerticalScrollBarEnabled(false);
    wv.setHorizontalScrollBarEnabled(false);
    wv.loadUrl("file:///android_asset/6.html");

}

private class HelloWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
    }
}
}

<强> main.xml中

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

   <WebView
   android:id="@+id/webview"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"/>
</LinearLayout>

<强> 6.html

<html>
<head>
<style type="text/css">

body {
margin: 0;
    background-color: black;
}

html, body, #my-image {
    width: 100%;
    height: 100%;
}

#my-image {
    background-size: cover;
    background-image: url(splash.png);
    background-position: center center;
    background-repeat: no-repeat;
}

</style>
</head>
<body>

<div id="my-image"></div>

</body>
</html>

如何设置图像的大小？

3 个答案: