如何将LinearLayout转换为Bitmap而无需在android中重塑？

问题描述

我正在为pax打印机开发一个应用程序，因此我需要将xml布局（线性，相对，...）转换为位图，我的问题是当我将任何布局转换为图像时，创建的位图宽度大小为重塑。为什么会这样？我该如何解决这个问题？ 这是我的转换代码：

LayoutInflater lInflater = (LayoutInflater)getApplicationContext().getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
View view = lInflater.inflate(R.layout.testlayout,null);
view.setDrawingCacheEnabled(true);
view.measure(View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED),View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED));
view.layout(0,view.getMeasuredWidth(),view.getMeasuredHeight());
view.buildDrawingCache(true);
Bitmap b = Bitmap.createBitmap(view.getDrawingCache());
view.setDrawingCacheEnabled(false); // clear drawing cache
imgview.setimageBitmap(b);
storeImage(b); 

我尝试了许多其他转换方式，但结果却相同。 这是我的布局之一：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:id="@+id/printLL"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:background="#fff">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/printing">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            >


            <ScrollView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                >

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">



                    <TextView
                        android:id="@+id/text_logo"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center"
                        android:layout_margin="2sp"
                        android:gravity="center"
                        android:text="Header"
                        android:textSize="13sp" />


                    <TextView
                        android:id="@+id/counter"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center"
                        android:layout_margin="2sp"
                        android:gravity="center"
                        android:text="Title" />

                    <TableLayout
                        android:id="@+id/record_table"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center"
                        android:layout_margin="5dp"
                        android:background="#ffffff"
                        android:gravity="center"
                        android:shrinkColumns="*"
                        android:stretchColumns="*"

                        >

                        <TableRow android:layout_gravity="center_horizontal">


                            <TextView
                                android:id="@+id/CustomerName"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="Username" />


                        </TableRow>

                        <TableRow android:gravity="center_horizontal">

                            <TextView
                                android:id="@+id/customer_id"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextView" />

                            <TextView
                                android:id="@+id/postalcode"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextView" />


                        </TableRow>

                        <TableRow android:gravity="center_horizontal">


                            <TextView
                                android:id="@+id/Address"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextView" />

                        </TableRow>

                        <TableRow android:gravity="center_horizontal">


                            <TextView
                                android:id="@+id/ID"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextView" />


                            <TextView
                                android:id="@+id/customer_number"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextView" />


                        </TableRow>

                        <TableRow android:gravity="center_horizontal">


                            <TextView
                                android:id="@+id/Serial"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextView" />


                            <TextView
                                android:id="@+id/Digit"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextView" />


                        </TableRow>

                        <TableRow android:gravity="center_horizontal">


                            <TextView
                                android:id="@+id/PrevCode"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextView" />

                            <TextView
                                android:id="@+id/PrevDebt"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextView" />


                        </TableRow>

                        <TableRow android:gravity="center_horizontal">


                            <TextView
                                android:id="@+id/PrevDate"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextView" />


                        </TableRow>

                        <TableRow>

                            <TextView
                                android:id="@+id/Usage_type"
                                android:layout_weight="1"
                                android:gravity="center"
                                android:padding="3sp"
                                android:text="TextViwe" />
                        </TableRow>

                    </TableLayout>




                </LinearLayout>

            </ScrollView>







        </LinearLayout>

    </FrameLayout>

</LinearLayout>

the layout view

converted layout to bitmap

请注意，无论布局，textview，imageview等是什么，或者我使用的是哪种布局类型。总是存在相同的问题

感谢您的帮助

解决方法

尝试一下：

public static Bitmap view2Bitmap(final FrameLayout view) {
        if (view == null) return null;
        boolean drawingCacheEnabled = view.isDrawingCacheEnabled();
        boolean willNotCacheDrawing = view.willNotCacheDrawing();
        view.setDrawingCacheEnabled(true);
        view.setWillNotCacheDrawing(false);
        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,view.getMeasuredWidth(),view.getMeasuredHeight());
            view.buildDrawingCache();
            drawingCache = view.getDrawingCache();
            if (drawingCache != null) {
                bitmap = Bitmap.createBitmap(drawingCache);
            } else {
                bitmap = Bitmap.createBitmap(view.getMeasuredWidth(),view.getMeasuredHeight(),Bitmap.Config.ARGB_8888);
                Canvas canvas = new Canvas(bitmap);
                view.draw(canvas);
            }
        } else {
            bitmap = Bitmap.createBitmap(drawingCache);
        }
        view.destroyDrawingCache();
        view.setWillNotCacheDrawing(willNotCacheDrawing);
        view.setDrawingCacheEnabled(drawingCacheEnabled);
        return bitmap;
    }