Question

我需要获取View的屏幕截图。我尝试了两种方法来完成这项工作。不幸的是，两者都导致同一个错误。

这是日志：

java.lang.IllegalArgumentException: Software rendering doesn't support hardware bitmaps
at android.graphics.BaseCanvas.null onHwBitmapInSwMode(null)(BaseCanvas.java:550)
at android.graphics.BaseCanvas.null throwIfHwBitmapInSwMode(null)(BaseCanvas.java:557)
at android.graphics.BaseCanvas.null throwIfCannotDraw(null)(BaseCanvas.java:69)
at android.graphics.BaseCanvas.null drawBitmap(null)(BaseCanvas.java:127)
at android.graphics.Canvas.null drawBitmap(null)(Canvas.java:1504)
at android.graphics.drawable.BitmapDrawable.null draw(null)(BitmapDrawable.java:545)
at android.widget.ImageView.null onDraw(null)(ImageView.java:1355)
at android.view.View.null draw(null)(View.java:20248)
at android.view.View.null draw(null)(View.java:20118)
at android.view.ViewGroup.null drawChild(null)(ViewGroup.java:4336)
at android.view.ViewGroup.null dispatchDraw(null)(ViewGroup.java:4115)
at android.view.ViewOverlay$OverlayViewGroup.null dispatchDraw(null)(ViewOverlay.java:251)
at android.view.View.null draw(null)(View.java:20251)
at android.view.View.null buildDrawingCacheImpl(null)(View.java:19516)
at android.view.View.null buildDrawingCache(null)(View.java:19379)
at android.view.View.null getDrawingCache(null)(View.java:19215)
at android.view.View.null getDrawingCache(null)(View.java:19166)
at com.omnipotent.free.videodownloader.pro.utils.ViewUtils.android.graphics.Bitmap captureView(android.view.View)(ViewUtils.java:70)
at com.omnipotent.free.videodownloader.pro.ui.main.MainActivity.com.omnipotent.free.videodownloader.pro.data.bean.TabBean getCurrentTabsData()(MainActivity.java:325)
at com.omnipotent.free.videodownloader.pro.ui.main.MainActivity.com.omnipotent.free.videodownloader.pro.data.bean.TabBean access$getCurrentTabsData(com.omnipotent.free.videodownloader.pro.ui.main.MainActivity)(MainActivity.java:84)
at com.omnipotent.free.videodownloader.pro.ui.main.MainActivity$onAddTab$1.void run()(MainActivity.java:628)
at android.os.Handler.null handleCallback(null)(Handler.java:873)
at android.os.Handler.null dispatchMessage(null)(Handler.java:99)
at android.os.Looper.null loop(null)(Looper.java:193)
at android.app.ActivityThread.null main(null)(ActivityThread.java:6936)
at java.lang.reflect.Method.null invoke(null)(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.null run(null)(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.null main(null)(ZygoteInit.java:870)

我仔细检查了代码，并在Internet上查找了相关文章。但是，我尚未解决，这确实让我感到沮丧。此错误仅在android O以上发生过。

这是我尝试过的两种方法：

方法1：

public static Bitmap captureView(View view) {
    Bitmap tBitmap = Bitmap.createBitmap(
            view.getWidth(), view.getHeight(), Bitmap.Config.RGB_565);
    Canvas canvas = new Canvas(tBitmap);
    view.draw(canvas);
    canvas.setBitmap(null);
    return tBitmap;
}

方法2：

public static Bitmap captureView(View view) {

    if (view == null) return null;
    boolean drawingCacheEnabled = view.isDrawingCacheEnabled();
    boolean willNotCacheDrawing = view.willNotCacheDrawing();
    view.setDrawingCacheEnabled(true);
    view.setWillNotCacheDrawing(false);
    final Bitmap drawingCache = view.getDrawingCache();
    Bitmap bitmap;
    if (null == drawingCache) {
        view.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
        view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
        view.buildDrawingCache();
        bitmap = Bitmap.createBitmap(view.getDrawingCache());
    } else {
        bitmap = Bitmap.createBitmap(drawingCache);
    }
    view.destroyDrawingCache();
    view.setWillNotCacheDrawing(willNotCacheDrawing);
    view.setDrawingCacheEnabled(drawingCacheEnabled);
    return bitmap;
}

需要提及的是，我为android:hardwareAccelerated="true"设置了Activity，并在其中调用了captureView方法。

Answer 1

您可以尝试将硬件类型位图复制到您想要的类型位图，例如：

// function that takes user's input after a quick validation test  
// returned value is the user's input

function query() {
    // validation code
    const input = document.getElementById('search').value;
    
    if(input.length < 3){
        alert("Please enter more than two characters.");
        return; // Added this so that we're not returning a value that's too short
    }
    return input;
}

// function that retrieves data from API endpoint by concatenating API url with query variable
function getData(){

    const qParam = query();
    if( !qParam ) return; // if there's no valid query value, no need to try to call the API
    
    fetch(`https://github.uconn.edu/api/v3/search/users?q=${qParam}`)
    .then((response) => response.json())
    .then((response) => {
        console.log(response);
    })
    // catch is a callback function for when request fails
    .catch((error) => {
        console.log(error);
    })
}

searchBtn.addEventListener('click', getData);

Answer 2

使用它来捕获视图（适用于android 8.0）：

class CaptureView{

    static Bitmap capture(View view){
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();

        return view.getDrawingCache(); //Returns a bitmap
    }
}

Bitmap bitmap = CaptureView.capture(yourView) // Pass in the view to capture

Answer 3

阅读Glide hardware bitmap docs，找到from unittest import TestCase from app.application import create_app, db class BaseTestCase(TestCase): def setUp(self): self.app = create_app() self.db = db self.app.config['TESTING'] = True self.app_context = self.app.app_context() self.app_context.push() self.client = self.app.test_client() def tearDown(self): self.db.session.remove() self.db.get_engine(self.app).dispose() self.app_context.pop()类，可以解决此错误。

使用PixelCopy将PixelCopy转换为Android O以上的view，并使用Android O以下的先前方法。

这是我的代码：

Bitmap

不足之处是我必须使用回调，我不太喜欢。

希望它能起作用。

java.lang.IllegalStateException：软件渲染不支持硬件位图

3 个答案: