Android Text to Image issue

Question

我有Android应用程序中的文本图像代码，它正在成功地将文本转换为图像并保存到SD卡中的本地位置。我面临的问题是它不会将完整的文本转换为图像。这里是我提供给textview的文本“这是t ashdf asdhfj sdhkfh shd jshd hsdhfsdjkhfksdjfhsdlhfksldhfklh shdkfjhsdkj hfsdjk kdjhfsk djhfskldh shdjkfhk sjhdfkh”。以下是将其转换为图像

这里是我的代码

RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, 60); 

    tv.setLayoutParams(layoutParams); 

    tv.setText("this is t ashdf asdhfj sdhkfh shd jshd hsdhfsdjkhfksdjfhsdlhfksldhfklh shdkfjhsdkj hfsdjk kdjhfsk djhfskldh shdjkfhk sjhdfkh "); 
    tv.setTextColor(Color.BLACK); 
    tv.setBackgroundColor(Color.WHITE); 

    Bitmap testB; 
    timer = new Timer(); 
    timer.schedule(new TickerTask(), 1000,25); 
    testB = Bitmap.createBitmap(tv.getText().length(), 20, Bitmap.Config.ARGB_8888); 
    Canvas c = new Canvas(testB); 

    tv.layout(0, 0, 800, 30); 
    tv.draw(c); 
    iv = (ImageView) findViewById(R.id.menuIcon); 
    x=40; 
    iv.setPadding(x, 0, 0, 0); 
    iv.setLayoutParams(layoutParams); 
    iv.setBackgroundColor(Color.GREEN); 
    iv.setImageBitmap(testB); 
    iv.setDrawingCacheEnabled(true); 
    BitmapDrawable drawable = (BitmapDrawable) iv.getDrawable(); 
    Bitmap bitmap = drawable.getBitmap(); 
    //Bitmap bitmap = testB; 
    File sdCardDirectory = Environment.getExternalStorageDirectory(); 
    File image = new File(sdCardDirectory, "test.png"); 

    boolean success = false; 

    // Encode the file as a PNG image. 
    FileOutputStream outStream; 
    try { 

     outStream = new FileOutputStream(image); 
     bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream); 
     /* 100 to keep full quality of the image */ 

     outStream.flush(); 
     outStream.close(); 
     success = true; 
    } catch (FileNotFoundException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    if (success) { 
     Toast.makeText(getApplicationContext(), "Image saved with success"+tv.getText().length(), 
       Toast.LENGTH_LONG).show(); 
    } else { 
     Toast.makeText(getApplicationContext(), 
       "Error during image saving", Toast.LENGTH_LONG).show(); 
    } 

Answer 1

要完全将文本转换为你要的图像获取textview内部文本的宽度而不是textview本身。所以这里是你如何获得文本的宽度。

string texting="Some Text"; 
    Rect bounds = new Rect(); 
    Paint textPaint = tv.getPaint(); 
    textPaint.getTextBounds(texting,0,texting.length(),bounds); 
    int heights= bounds.height(); 
    int widths = bounds.width(); 

现在你可以使用上面的宽度和高度，以创建位图和完整文本（无论多久或小）将被转换为图像。

Answer 2

改变该行：

RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, 60); 

要这样：

RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); 

要直接画你可以试试这个：

Paint paint = new Paint(); 
paint.setStyle(Paint.Style.FILL); 
paint.setAntiAlias(true); 
paint.setTextSize(30); 
canvas.drawText("Style.FILL", 75, 110, paint); 

Answer 3

我想问题在于你的宽度TextView。你的方法将你的视图的绘制区域转换为位图。如果你的文本的一部分被隐藏，那么确实不会绘制在绘图区域中。为什么你不从TextView获取文本，并将其写入到一个画布，您可以使用此方法：？

canvas.drawText(); 

示例代码：

Paint paint = new Paint(); 
paint.setColor(Color.RED); 
paint.setStyle(Paint.Style.FILL); 

paint.setAntiAlias(true); 

paint.setTextSize(20); 

canvas.drawText("Hello Android! Fill...", 50, 230, paint);