Question

@Override
public void onPause() {
   super.onPause();
}

private void generateView() {
   for (int i = 0; i < 80; i++) {
      ln_highlightprogress.setVisibility(View.VISIBLE);
      LinearLayout mview = new LinearLayout(getActivity());
      mview.setBackgroundResource(R.color.grayColor);
      LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(7, 40);
      layoutParams.setMargins(2, 0, 2, 0);
      mview.setLayoutParams(layoutParams);
      lnLinearlayout.addView(mview);
      Log.d("==================", "=================" + i);
      Log.v("==================", "=================" + i);
   }
   changeProgress();
}

private void changeProgress() {
   mChangeProgressThread = new Thread(new Runnable() {
       @Override
       public void run() {
          // Update the progress status
          for (int i = 0; i < lnLinearlayout.getChildCount(); i++) {
             final int finalI = i;
             progressStatus = i;
             // Try to sleep the thread for 20 milliseconds
             try {
                  Thread.sleep(1000);
             } catch (InterruptedException e) {
                  e.printStackTrace();
             }
             // Update the progress bar
             handler.post(new Runnable() {
                  @Override
                  public void run() {
                     if (highlightButtonWorkComplete && finalI == secondYellowColoredTextViewPosition) {
                     } else {
                       lnLinearlayout.getChildAt(finalI).setBackgroundResource(R.color.white);
                     }
                     if (finalI == (lnLinearlayout.getChildCount() - 1)) {
                        for (int i = 0; i < lnLinearlayout.getChildCount(); i++) {
                           if (highlightButtonWorkComplete && finalI == secondYellowColoredTextViewPosition) {
                              // leave this textview , as it is yellow ... go to next textview
                              secondYellowColoredTextViewPosition = 0;
                              highlightButtonWorkComplete = false;
                           } else {
                              lnLinearlayout.getChildAt(i).setBackgroundResource(R.color.grayColor);
                           }
                        }
                        Log.d("Progress Status", "ProgressStatus" + progressStatus);
                        if (progressStatus % 79 == 0) {
                           lnLinearlayout.removeAllViews();
                           generateView();
                        }
                     }

                  }
             });
          }
       }
   });
   mChangeProgressThread.start();// Start the operation
}

private void changeHighlight() {
   secondYellowColoredTextViewPosition = progressStatus + endTime; //
   highlightButtonWorkComplete = true;
   lnLinearlayout.getChildAt(progressStatus - statartTime ).setLayoutParams(new LinearLayout.LayoutParams(7, 100));
   lnLinearlayout.getChildAt(progressStatus - statartTime  ).setBackgroundResource(R.color.yellow);
   mHightlightThread = new Thread(new Runnable() {
            @Override
            public void run() {
                final int size = endTime + (statartTime);
                for (int j = 0; j <= size - 1; j++) {
                    lastlopp = j;
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    mHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            lnLinearlayout.getChildAt(progressStatus - statartTime).setBackgroundResource(R.color.yellow);
                            if (lastlopp == size - 1) {
                                lnLinearlayout.getChildAt(secondYellowColoredTextViewPosition).setLayoutParams(new LinearLayout.LayoutParams(10, 100));
                                lnLinearlayout.getChildAt(secondYellowColoredTextViewPosition).setBackgroundResource(R.color.yellow);
                            }
                        }
                    });
                }
                //got?yes .. may be calculation problem
            }
   });
   mHightlightThread.start();
}

Answer 1

在线程中使用布尔标志。如果boolean为true，则不执行其他代码。在onPause方法中，您可以使用线程代码中将使用的布尔标志为false。希望有所帮助

你可以做什么做一个全局布尔变量并且在onPause上调用set boolean true let的布尔是stopThread

stopThread = true

在循环中首先检查

if(stopThread) {
   break;
}

Answer 2

而不是使用Thread，Handler和Thread.sleep，请尝试仅使用Handler。并尝试在Handler中使用postDelayed。并且您可以使用removeCallbacks

删除Handler runnable

这里给出了使用Handler而不是Thread更改onProgressChange方法的示例。

Runnable MyRunnable = new Runnable() {
    @Override
    public void run() {
        if (highlightButtonWorkComplete && finalI == secondYellowColoredTextViewPosition) {


        } else {

            lnLinearlayout.getChildAt(finalI).setBackgroundResource(R.color.white);
        }

        if (finalI == (lnLinearlayout.getChildCount() - 1)) {
            for (int i = 0; i < lnLinearlayout.getChildCount(); i++) {
                if (highlightButtonWorkComplete && finalI == secondYellowColoredTextViewPosition) {
                    // leave this textview , as it is yellow ... go to next textview

                    secondYellowColoredTextViewPosition = 0;
                    highlightButtonWorkComplete = false;

                } else {

                    lnLinearlayout.getChildAt(i).setBackgroundResource(R.color.grayColor);
                }
            }
            Log.d("Progress Status", "ProgressStatus" + progressStatus);

            if (progressStatus % 79 == 0) {
                lnLinearlayout.removeAllViews();
                generateView();
            }
        }

        if(progressStatus < 80) {
            mHandler.postDelayed(this, 1000);
        }
    }
};

private int progressStatus = 0;

private Handler mHandler = new Handler();

@Override
protected void onResume() {
    super.onResume();

    generateView();
}

@Override
protected void onPause() {
    super.onPause();

    mHandler.removeCallbacks(MyRunnable);
}

private void generateView() {
    for (int i = 0; i < 80; i++) {
        ln_highlightprogress.setVisibility(View.VISIBLE);
        LinearLayout mview = new LinearLayout(getActivity());
        mview.setBackgroundResource(R.color.grayColor);
        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
                7, 40);
        layoutParams.setMargins(2, 0, 2, 0);
        mview.setLayoutParams(layoutParams);
        lnLinearlayout.addView(mview);
        Log.d("==================", "=================" + i);
        Log.v("==================", "=================" + i);
    }
    progressStatus = 0;
    mHandler.postDelayed(MyRunnable, 1000);
    // changeProgress();
}

如何在android中的onPause（）方法中取消线程

2 个答案: