Android studio 应用程序在不同的设备上表现不同

我创建了一个应用程序，当我在摩托罗拉Xoom上运行它时，它会像我预期的那样执行主要活动，但当我在华为手机上运行它时，它会显示Hello World，而不会执行主要活动。（Android分别为4.1.2和8。我使用基本活动和空活动创建了项目，并获得了相同的结果）。如何阻止Hello World

package com.example.xoom;

import android.hardware.usb.UsbConstants;
import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

import android.app.PendingIntent;
import android.content.Intent;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.ForegroundColorSpan;
import android.text.style.RelativeSizeSpan;

import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.RelativeLayout;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Button;

import android.content.Context;
import android.hardware.usb.UsbManager;
import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbDeviceConnection;
import android.hardware.usb.UsbEndpoint;
import android.hardware.usb.UsbInterface;
import android.graphics.Color;
import android.graphics.Typeface;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.HashMap;

public class MainActivity extends AppCompatActivity
{
    final Button[] pitchButton = new Button[50];
    int startLength;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String ACTION_USB_PERMISSION = "com.example.xoom";

        byte[] sendChar = {0x5A}; // ASCII "Z"
        byte[] getChar = new byte[200];
        boolean addListener;
        TextView tv = new TextView(this);
        int buttonCount = 0;

        for (int i = 0; i < 50; i++)
        {
            pitchButton[i] = new Button(this);
            pitchButton[i].setTypeface(Typeface.MONOSPACE);
        }
        tv.setTextSize(20);
        getWindow().getDecorView().setBackgroundColor(Color.CYAN);

        UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);

        if (manager.getDeviceList().isEmpty()) // The device list is empty
        {
            tv.setTextColor(Color.RED);
            tv.append("No USB Devices Found");
        }
        else
        {
            tv.setTextColor(Color.BLUE);
            HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
            Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();
            UsbDevice device = deviceIterator.next(); // Get first device in list

            PendingIntent pi = PendingIntent.getBroadcast(this, 0,
                    new Intent(ACTION_USB_PERMISSION), 0);
            manager.requestPermission(device, pi);

            UsbDeviceConnection connection = manager.openDevice(device);

            getDeviceProperties(device, manager, tv);       // Show USB device properties
            getInterfaceProperties(device, connection, tv); // Show USB Interface properties
            tv.setText(""); // Clear information from above because you don't want to see
                            // it normally but sometimes you do. Make this statement
                            // a comment if you do.
            setConnectionProperties(connection); // Set speed etc of connection

            UsbEndpoint endpointOut = device.getInterface(1).getEndpoint(1);
            UsbEndpoint endpointIn = device.getInterface(1).getEndpoint(0);

            connection.bulkTransfer(endpointOut, sendChar, 1, 500); // Send request for data
            //
            // It takes more than one read to get the data out of the FIFO
            // Build up message by polling the FIFO until there is nothing left
            // This has taken a lot of fiddling about to make it work. The baud
            // and the timeouts have to be just so.
            // (9600 and 200 work here but why who knows (or cares))
            //
            int k = 0;
            char[] labelStr = new char[20];
            int flag = Spanned.SPAN_EXCLUSIVE_EXCLUSIVE;
            int bytesReceived = connection.bulkTransfer(endpointIn, getChar, 200, 200);
            while (bytesReceived > 0)
            {
                for (int j = 0; j < bytesReceived; j++)
                {
                    labelStr[k++] = (char) getChar[j];
                    if (getChar[j] == 13) // Carriage return
                    {
                        String label = String.valueOf(labelStr, 1, k - 1);
                        SpannableString spanLabel = new SpannableString(label);
                        spanLabel.setSpan(new RelativeSizeSpan(1.0f), 0, spanLabel.length(), flag);
                        addListener = true;
                        if (label.contains("Cross Slide"))
                        {   // Start adding pitches
                            spanLabel = new SpannableString("Pitch");
                            spanLabel.setSpan(new ForegroundColorSpan(Color.RED), 0, spanLabel.length(), flag);
                            addListener = false;
                        }
                        if (label.contains("End"))
                        { // Start adding lengths
                            spanLabel = new SpannableString("Length");
                            spanLabel.setSpan(new ForegroundColorSpan(Color.RED), 0, spanLabel.length(), flag);
                            addListener = false;
                            if (startLength == 0) // Avoid the second "End" messages from MCU
                                startLength = buttonCount;
                        }
                        pitchButton[buttonCount].setText(spanLabel);
                        pitchButton[buttonCount].setId(buttonCount);
                        if (addListener)
                        {
                            pitchButton[buttonCount].setOnClickListener(new View.OnClickListener()
                            {
                                @Override
                                public void onClick(View v)
                                {
                                    int buttonIndex;
                                    Button buttonText = (Button) v;
                                    String bt = buttonText.getText().toString();
                                    String message;
                                    if (bt.contains(".")) // On Button press display selected value
                                    {
                                        message = "Pitch ";
                                        buttonIndex = 0;
                                    }
                                    else
                                    {
                                        message = "Length ";
                                        buttonIndex = startLength;
                                    }

                                    message = message + bt;
                                    pitchButton[buttonIndex].setText(message);
                                    pitchButton[buttonIndex].setBackgroundColor(Color.GREEN);
                                }
                            });
                        }
                        buttonCount++;
                        k = 0;
                    }
                }
                bytesReceived = connection.bulkTransfer(endpointIn, getChar, 200, 200);
            }
            connection.close();
            RelativeLayout.LayoutParams[] params = new RelativeLayout.LayoutParams[100];
            RelativeLayout rel = new RelativeLayout(this);
            rel.addView(tv);
            int leftMargin = 0;
            int topMargin = 0;
            int lineCount = 0;
            for (int i = 0; i < buttonCount - 1; i++)
            {
                params[i] = new RelativeLayout.LayoutParams(
                        RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
                params[i].width = 150;
                params[i].height = 50;
                if (Math.IEEEremainder(lineCount, 5) == 0) // Put 5 buttons per line
                {
                    topMargin = topMargin + params[i].height;
                    leftMargin = 0;
                }
                lineCount++;
                if (pitchButton[i].getText().toString().contains("Pitch"))
                {
                    topMargin = topMargin + params[i].height;
                    leftMargin = 0;
                    lineCount = 0;
                }
                if (pitchButton[i].getText().toString().contains("Length"))
                {
                    topMargin = topMargin + params[i].height;
                    leftMargin = 0;
                    lineCount = 0;
                }
                params[i].leftMargin = leftMargin;
                leftMargin = leftMargin + params[i].width;
                params[i].topMargin = topMargin;
                pitchButton[i].setLayoutParams(params[i]);
                rel.addView(pitchButton[i]);
            }
            //
            //Add control for setting taper
            //
            ArrayList<String> taperArray = new ArrayList<String>();
            taperArray.add("1");
            taperArray.add("2");
            taperArray.add("3");
            Spinner spinner = new Spinner(this,Spinner.MODE_DIALOG);
            spinner.setBackgroundColor(Color.BLUE);
            String taperPrompt = "Set Taper Angle";
            RelativeLayout.LayoutParams spinnerParams = new RelativeLayout.LayoutParams(
                    RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
            spinnerParams.width      = 50;
            spinnerParams.height     = 40;
            spinnerParams.topMargin  = 600;
            spinnerParams.leftMargin = 200;
            spinner.setPrompt("Select Taper Angle");
            spinner.setLayoutParams(spinnerParams);
            ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, taperArray);
            spinner.setAdapter(spinnerArrayAdapter);
            spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
                                              {
                                                  public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l)
                                                  {
                                                  }
                                                  public void onNothingSelected(AdapterView<?> adapterView)
                                                  {
                                                  }
                                              });

            RelativeLayout.LayoutParams taperParams = new RelativeLayout.LayoutParams(
                    RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
            taperParams.width      = 200;
            taperParams.height     = 50;
            taperParams.topMargin  = 600;
            taperParams.leftMargin = 10;
            TextView taperView = new TextView(this);
            taperView.setLayoutParams(taperParams);
            taperView.setText(taperPrompt);
            taperView.setTextColor(Color.RED);
            taperView.setTextSize(20);
            rel.addView(taperView);

            rel.addView(spinner);

            setContentView(rel);
        }
    }
    public void setConnectionProperties(UsbDeviceConnection connection)
    {
        connection.controlTransfer(0x40, 0, 0, 0, null, 0, 0);// reset
        // mConnection.controlTransfer(0×40,
        // 0, 1, 0, null, 0,
        // 0);//clear Rx
        connection.controlTransfer(0x40, 0, 2, 0, null, 0, 0);// clear Tx
        connection.controlTransfer(0x40, 0x02, 0x0000, 0, null, 0, 0);// flow
        // control
        // none
        connection.controlTransfer(0x40, 0x03, 0x4138, 0, null, 0, 0);// baudrate
        // 9600 (4138 is 9600, 1A is 115200 0271 is 4800)
        connection.controlTransfer(0x40, 0x04, 0x0008, 0, null, 0, 0);// data bit
        // 8, parity
        // none,
        // stop bit
        // 1, tx off
    }
    public void getInterfaceProperties(UsbDevice device, UsbDeviceConnection connection, TextView tv)
    {
        int interfaceCount = device.getInterfaceCount();
        int endPointCount;
        for (int i=0; i < interfaceCount-1; i++)
        {
            if (connection.claimInterface(device.getInterface(i), true)) {
                tv.append("\nConnection Interface " + i + " Claim succeeded \n");
                UsbInterface interfce = device.getInterface(i);
                endPointCount = interfce.getEndpointCount();
                tv.append("Endpoint count for Interface " + i + " is " + endPointCount + "\n");
                for (int j = 0; j < endPointCount; j++) {
                    if (interfce.getEndpoint(j).getType() == UsbConstants.USB_ENDPOINT_XFER_INT)
                        tv.append("Endpoint " + j + " Type is Xfer Int \n");
                    if (interfce.getEndpoint(j).getType() == UsbConstants.USB_ENDPOINT_XFER_BULK)
                        tv.append("Endpoint " + j + " Type is Bulk Xfer \n");
                    if (interfce.getEndpoint(j).getDirection() == UsbConstants.USB_DIR_IN)
                        tv.append("Endpoint " + j + " Direction is IN \n");
                    if (interfce.getEndpoint(j).getDirection() == UsbConstants.USB_DIR_OUT)
                        tv.append("Endpoint " + j + " Direction is OUT \n");
                    tv.append("Max packet size = " + interfce.getEndpoint(j).getMaxPacketSize() + "\n");
                }
                tv.append("Interface Protocol is " + interfce.getInterfaceProtocol() + "\n");
            }
        }
    }
    public void getDeviceProperties(UsbDevice device, UsbManager manager, TextView tv)
    {
        tv.setTextSize(20);
        tv.setTextColor(Color.BLUE);

        tv.append("USB Device name = " + device.getDeviceName() + "\n");
        tv.append("USB Product Id = " + device.getProductId() + "\n");
        tv.append("USB Vendor Id = " + device.getVendorId() + "\n");
        tv.append("USB Device Id = " + device.getDeviceId() + "\n");

        if (manager.hasPermission(device)) // Can the App access the device ?
        {
            tv.append("Device Permission = Yes \n");
        }
        else
        {
            tv.append("Device Permission = No \n");
        }
    }
}

package com.example.xoom；
导入android.hardware.usb.UsbConstants；
导入android.os.Bundle；
导入androidx.appcompat.app.appcompat活动；
导入android.app.pendingent；
导入android.content.Intent；
导入android.text.SpannableString；
导入android.text.span；
导入android.text.style.ForegroundColorSpan；
导入android.text.style.RelativeSizeSpan；
导入android.view.view；
导入android.widget.AdapterView；
导入android.widget.ArrayAdapter；
导入android.widget.RelativeLayout；
导入android.widget.Spinner；
导入android.widget.TextView；
导入android.widget.Button；
导入android.content.Context；
导入android.hardware.usb.UsbManager；
导入android.hardware.usb.UsbDevice；
导入android.hardware.usb.UsbDeviceConnection；
导入android.hardware.usb.UsbEndpoint；
导入android.hardware.usb.usb接口；
导入android.graphics.Color；
导入android.graphics.Typeface；
导入java.util.ArrayList；
导入java.util.Iterator；
导入java.util.HashMap；
公共类MainActivity扩展了AppCompatActivity
{
最终按钮[]pitchButton=新按钮[50]；
长度；
@凌驾
创建时受保护的void（Bundle savedInstanceState）
{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
字符串操作\u USB\u PERMISSION=“com.example.xoom”；
字节[]sendChar={0x5A}；//ASCII“Z”
字节[]getChar=新字节[200]；
布尔addListener；
TextView tv=新的TextView（此）；
int buttonCount=0；
对于（int i=0；i<50；i++）
{
pitchButton[i]=新按钮（此按钮）；
pitchButton[i].setTypeface（Typeface.MONOSPACE）；
}
电视节目（20）；
getWindow（）.getDecorView（）.setBackgroundColor（Color.CYAN）；
UsbManager manager=（UsbManager）getSystemService（Context.USB_服务）；
if（manager.getDeviceList（）.isEmpty（））//设备列表为空
{
tv.setTextColor（颜色：红色）；
附加（“未找到USB设备”）；
}
其他的
{
tv.setTextColor（Color.BLUE）；
HashMap deviceList=manager.getDeviceList（）；
迭代器deviceIterator=deviceList.values（）.Iterator（）；
UsbDevice device=deviceIterator.next（）；//获取列表中的第一个设备
PendingIntent pi=PendingIntent.getBroadcast（这个，0，
新意图（操作权限），0）；
manager.requestPermission（设备，pi）；
UsbDeviceConnection=manager.openDevice（设备）；
getDeviceProperties（设备、管理器、电视）；//显示USB设备属性
getInterfaceProperties（设备、连接、电视）；//显示USB接口属性
tv.setText（“”；//清除上面的信息，因为您不想看到
//这是正常的，但有时你会这样做
//如果你这样做了，请发表评论。
setConnectionProperties（连接）；//设置连接的速度等
UsbEndpoint endpointOut=device.getInterface（1.getEndpoint（1）；
UsbEndpoint endpointIn=device.getInterface（1.getEndpoint（0）；
connection.bulkTransfer（endpointOut，sendChar，1500）；//发送数据请求
//
//从FIFO中读取数据需要多次读取
//通过轮询先进先出（FIFO）建立消息，直到什么都没有留下
//这花了很多时间才使它工作。波特率
//暂停时间也必须如此。
//（9600和200在这里工作，但为什么谁知道（或关心））
//
int k=0；
char[]labelStr=新字符[20]；
int flag=SPAN.SPAN_EXCLUSIVE_EXCLUSIVE；
int bytesReceived=connection.bulkTransfer（endpointIn，getChar，200200）；
而（接收字节数>0）
{
对于（int j=0；j