Question

我想在按钮的onClick侦听器中做一些工作，但是在onClick（）方法完成后崩溃了

首先，我想在OnClickListener中不能做太多工作。因此我在新线程中进行了相同的工作，但崩溃仍然存在。

这是为按钮设置的OnClickListener：

172.31.20.nnn | UNREACHABLE! => {
    "changed": false, 
    "msg": "Failed to connect to the host via ssh: ssh: connect to host 172.31.20.nnn port 22: Connection timed out", 
    "unreachable": true
}

在这些代码中。 stopButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { CloseDevice(); mTxtStatus.setText("close device successfully!"); new Thread(new Runnable() { @Override public void run() { if (mBufImage == null) { runOnUiThread(new Runnable() { @Override public void run() { mTxtReport.setText("capture failed"); } }); return; } final byte reshapedImg[] = reshape(1); byte centerImage[] = addCenterPoint(reshapedImg, 256,256); if (centerImage == null) { runOnUiThread(new Runnable() { @Override public void run() { mTxtStatus.setText("run: locate failed"); } }); return; } else { runOnUiThread(new Runnable() { @Override public void run() { mTxtStatus.setText("run:locate success! "); } }); } final byte recropedImg [] = recropImg(reshapedImg,256,256); runOnUiThread(new Runnable() { @Override public void run() { Bitmap bitmap = ToolUtils.renderCroppedGreyScaleBitmap(recropedImg, 175, 175); mImgView.setImageBitmap(bitmap); } }); double feature [][] = ju.extractFeature(recropedImg,175,175); printarr(feature); } }).run(); } 此函数是本机方法。下一行 double feature [][] = ju.extractFeature(recropedImg,175,175); 将在logcat中打印数组。日志记录器显示在崩溃之前printarr（）的输出。所以我确定onClick（）方法完成了，但是崩溃了！

我怀疑它是否在我的本机方法中崩溃，因为只有在添加本机方法时才会发生崩溃。但是回溯显示它与我的本机库无关紧要：

printarr(feature);

任何人都可以给点建议吗？一切都感激不尽！谢谢你。

Answer 1

您需要通过 start（）方法而不是run（）来启动线程，因为run（）只会调用sâme线程中的runnable，因此会阻塞主线程：

stopButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                CloseDevice();
                mTxtStatus.setText("close device successfully!");
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        if (mBufImage == null) {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    mTxtReport.setText("capture failed");
                                }
                            });

                            return;
                        }


                        final byte reshapedImg[] = reshape(1);
                        byte centerImage[] =  addCenterPoint(reshapedImg, 256,256);

                        if (centerImage == null) {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    mTxtStatus.setText("run: locate failed");
                                }
                            });

                            return;
                        } else {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    mTxtStatus.setText("run:locate success! ");
                                }
                            });

                        }


                        final byte recropedImg [] = recropImg(reshapedImg,256,256);
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Bitmap bitmap = ToolUtils.renderCroppedGreyScaleBitmap(recropedImg, 175, 175);

                                mImgView.setImageBitmap(bitmap);
                            }
                        });


                        double feature [][] = ju.extractFeature(recropedImg,175,175);
                        printarr(feature);
                    }
                }).start();
}

完成onClick后如何解决APP崩溃

1 个答案: