安卓打印队列提取问题

Question

代码如下，先获取一个打印管理器，再取得打印队列第一项，将内容输出，为什么运行不起来

或者有编写插件提取安卓打印文件的方法也可以

Answer 1

public class PrintUtil {

private static final String TAG = "PrintUtil";

public String SCREEN_SHOTS_LOCATION = Environment

.getExternalStorageDirectory().getPath();

/**

• 对当前view进行截屏，并保存到SCREEN_SHOTS_LOCATION指定的目录下
• @param view
• @param name
• @return

• @throws Exception
  */
  
  public void takeScreenShot(View view, String name,TakeScreenShotCallBack callback) throws Exception{
  
  takeScreenShot(view,name,SCREEN_SHOTS_LOCATION,callback);
  
  }

  TakeScreenShotCallBack mCallback = new TakeScreenShotCallBack(){
  
  @Override
  
  public void excute(File file) {
  
  // TODO Auto-generated method stub

  }

  };

  /**

• 把传入的view保存为图片

• @param parent 事件触发视图，可以是button等

• @param view 保存为图片的视图

• @param isShow 是否显示展示视图

• @return
  */
  
  public void shotViewAsImage(View parent,View view, boolean isShow){
  
  PopupWindow popupWindow = getPopuptWindow(view);
  
  if(isShow)
  
  popupWindow.showAtLocation(parent, Gravity.CENTER, 0, 0);
  
  File newFile = null;
  
  try {
  
  takeScreenShot(popupWindow.getContentView(),null,mCallback);
  
  } catch (Exception e) {
  
  Log.e(TAG, e.getMessage());
  
  }
  
  }

  /**

• 创建popupWindow

• @param popupWindow_view

• @return
  */
  
  protected PopupWindow getPopuptWindow(View popupWindow_view) {
  
  PopupWindow popupWindow = null;
  
  popupWindow = new PopupWindow(popupWindow_view, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, true);// 创建PopupWindow实例
  
  popupWindow.setBackgroundDrawable(new BitmapDrawable());
  
  popupWindow.setFocusable(true);
  
  popupWindow.setOutsideTouchable(false);
  
  return popupWindow;
  
  }

  public interface TakeScreenShotCallBack{
  
  public void excute(File file);
  
  }

  /**

• 对当前view进行截屏，并保存到path指定的目录下

• @param view

• @param name

• @param path

• @return

• @throws Exception
  */
  
  public void takeScreenShot(final View view, final String name,final String path,final TakeScreenShotCallBack callback) throws Exception {

  final Bitmap bitmap = convertViewToBitmap(view);
  
  Runnable runnable = new Runnable() {
  
  @Override
  
  public void run() {

  Canvas canvas = new Canvas(bitmap);
  
  int w = bitmap.getWidth();
  
  int h = bitmap.getHeight();
  
  Paint paint = new Paint();
  
  paint.setColor(Color.YELLOW);
  
  String n = null;
  
  if(null == name || "".equals(name)){
  
  SimpleDateFormat simple = new SimpleDateFormat("yyyyMMddhhmmss");
  
  n = simple.format(new Date());
  
  }else{
  
  n = name;
  
  }
  
  canvas.drawText("", w - w / 2, h - h / 10, paint);
  
  canvas.save();
  
  canvas.restore();
  
  FileOutputStream fos = null;
  
  File file = null;
  
  try {
  
  File sddir = new File(path);
  
  if (!sddir.exists()) {
  
  sddir.mkdirs();
  
  }
  
  //生成以时间为名称的文件
  
  file = new File(path + File.separator

  • n + ".png");
    fos = new FileOutputStream(file);
    if (fos != null) {
    bitmap.compress(Bitmap.CompressFormat.PNG, 90, fos);
    fos.close();
    }
    } catch (Exception e) {
    Log.e(TAG, e.getMessage(),e);
    }
    callback.excute(file);
    }
    };
    Thread thread = new Thread(runnable);
    thread.start();
    

  }

  /**

• 转换view为bitmap

• @param view

• @return
  */
  
  public Bitmap convertViewToBitmap(View view){
  
  view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
  
  view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
  
  view.buildDrawingCache();
  
  Bitmap bitmap = view.getDrawingCache();
  
  return bitmap;
  
  }
  
  private BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
  
  }

调用函数

public void print(String data) {

View view = LayoutInflater.from(this).inflate(R.layout.print_test,

null, false);

//这几句可以注释掉，是另一个条形码生成的方法

/* ImageView bar_img = (ImageView) view
.findViewById(R.id.print_img_barcode);
try {
bar_img.setImageBitmap(testCODE39(data));
} catch (Exception e) {
} */

PrintUtil printer = new PrintUtil();

printer.shotViewAsImage(btn_print, view, true);

}