android - APK 未安装在三星 Galaxy S8 上

Question

我刚刚使用 Android Studio 编写了一个 Android 应用程序。该应用程序编译没有错误，并且我还生成了签名的 APK，但如果我尝试将它安装在我的智能手机（三星 Galaxy S8）上，它会显示“应用程序未安装”。可能是什么问题？

这里有我的 Java 代码、我的 gradle、我的清单。

package com.unicampania.btapp;

import android.bluetooth.BluetoothSocket;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;

public class ConnectedThread extends Thread{
    private final BluetoothSocket mmSocket;
    private final InputStream mmInStream;
    private final OutputStream mmOutStream;
    public static final int RESPONSE_MESSAGE = 10;
    Handler uih;

    public ConnectedThread(BluetoothSocket socket, Handler uih){
        mmSocket = socket;
        InputStream tmpIn = null;
        OutputStream tmpOut = null;
        this.uih = uih;
        Log.i("[THREAD-CT]","Creating thread");
        try{
            tmpIn = socket.getInputStream();
            tmpOut = socket.getOutputStream();

        } catch(IOException e) {
            Log.e("[THREAD-CT]","Error:"+ e.getMessage());
        }

        mmInStream = tmpIn;
        mmOutStream = tmpOut;

        try {
            mmOutStream.flush();
        } catch (IOException e) {
            return;
        }
        Log.i("[THREAD-CT]","IO's obtained");

    }
    public void run(){
        //byte[] buffer = new byte[1024];
        //int bytes;
        BufferedReader br = new BufferedReader(new InputStreamReader(mmInStream));
        Log.i("[THREAD-CT]","Starting thread");
        while(true){
            try{
                // bytes = mmInStream.read(buffer);
                String resp = br.readLine();
                //Transfer these data to the UI thread
                Message msg = new Message();
                msg.what = RESPONSE_MESSAGE;
                msg.obj = resp;
                uih.sendMessage(msg);
            }catch(IOException e){
                break;
            }
        }
        Log.i("[THREAD-CT]","While loop ended");
    }

    public void write(byte[] bytes){
        try{
            Log.i("[THREAD-CT]", "Writting bytes");
            mmOutStream.write(bytes);

        }catch(IOException e){}
    }

    public void cancel(){
        try{
            mmSocket.close();
        }catch(IOException e){}
    }
}

package com.unicampania.btapp;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.widget.Toolbar;
import java.io.IOException;
import java.util.UUID;
import androidx.appcompat.app.AppCompatActivity;

public class Main extends AppCompatActivity {

    public final static String MODULE_MAC = "98:D3:34:90:6F:A1";
    public final static int REQUEST_ENABLE_BT = 1;
    private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");

    BluetoothAdapter bta;
    BluetoothSocket mmSocket;
    BluetoothDevice mmDevice;
    ConnectedThread btt = null;
    Button switchLight, switchRelay;
    TextView response;
    boolean lightflag = false;
    boolean relayFlag = true;
    public Handler mHandler;

    @SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ardcon);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        Log.i("[BLUETOOTH]", "Creating listeners");
        response = (TextView) findViewById(R.id.response);
        switchRelay = (Button) findViewById(R.id.relay);
        switchLight = (Button) findViewById(R.id.switchlight);
        switchLight.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.i("[BLUETOOTH]", "Attempting to send data");
                if (mmSocket.isConnected() && btt != null) { //if we have connection to the bluetoothmodule
                    if (!lightflag) {
                        String sendtxt = "LY";
                        btt.write(sendtxt.getBytes());
                        lightflag = true;
                    } else {
                        String sendtxt = "LN";
                        btt.write(sendtxt.getBytes());
                        lightflag = false;
                    }
                } else {
                    Toast.makeText(Main.this, "Something went wrong", Toast.LENGTH_LONG).show();
                }
            }
        });
        switchRelay.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.i("[BLUETOOTH]", "Attempting to send data");
                if (mmSocket.isConnected() && btt != null) { //if we have connection to the bluetoothmodule
                    if(relayFlag){
                        String sendtxt = "RY";
                        btt.write(sendtxt.getBytes());
                        relayFlag = false;
                    }else{
                        String sendtxt = "RN";
                        btt.write(sendtxt.getBytes());
                        relayFlag = true;
                    }

                    //disable the button and wait for 4 seconds to enable it again
                    switchRelay.setEnabled(false);
                    new Thread(new Runnable() {
                        @Override
                        public void run() {
                            try{
                                Thread.sleep(4000);
                            }catch(InterruptedException e){
                                return;
                            }

                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    switchRelay.setEnabled(true);
                                }
                            });

                        }
                    }).start();
                } else {
                    Toast.makeText(Main.this, "Something went wrong", Toast.LENGTH_LONG).show();
                }
            }
        });

        bta = BluetoothAdapter.getDefaultAdapter();

        //if bluetooth is not enabled then create Intent for user to turn it on
        if(!bta.isEnabled()){
            Intent enableBTIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableBTIntent, REQUEST_ENABLE_BT);
        }else{
            initiateBluetoothProcess();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if(resultCode == RESULT_OK && requestCode == REQUEST_ENABLE_BT){
            initiateBluetoothProcess();
        }
    }

    public void initiateBluetoothProcess(){

        if(bta.isEnabled()){

            //attempt to connect to bluetooth module
            BluetoothSocket tmp = null;
            mmDevice = bta.getRemoteDevice(MODULE_MAC);

            //create socket
            try {
                tmp = mmDevice.createRfcommSocketToServiceRecord(MY_UUID);
                mmSocket = tmp;
                mmSocket.connect();
                Log.i("[BLUETOOTH]","Connected to: "+mmDevice.getName());
            }catch(IOException e){
                try{mmSocket.close();}catch(IOException c){return;}
            }

            Log.i("[BLUETOOTH]", "Creating handler");
            mHandler = new Handler(Looper.getMainLooper()){
                @Override
                public void handleMessage(Message msg) {
                    //super.handleMessage(msg);
                    if(msg.what == ConnectedThread.RESPONSE_MESSAGE){
                        String txt = (String)msg.obj;
                        if(response.getText().toString().length() >= 30){
                            response.setText("");
                            response.append(txt);
                        }else{
                            response.append("\n" + txt);
                        }
                    }
                }
            };

            Log.i("[BLUETOOTH]", "Creating and running Thread");
            btt = new ConnectedThread(mmSocket,mHandler);
            btt.start();


        }
    }

}

构建.gradle

plugins {
    id 'com.android.application'
}

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.3"

    defaultConfig {
        applicationId "com.unicampania.btapp"
        minSdkVersion 21
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    lintOptions {

        checkReleaseBuilds false

    }
}

dependencies {

    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:design:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'android.arch.navigation:navigation-fragment:1.0.0'
    implementation 'android.arch.navigation:navigation-ui:1.0.0'
    implementation 'androidx.appcompat:appcompat:1.2.0'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.unicampania.btapp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="30" />

    <uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

    <!-- Include required permissions for Google Maps API to run. -->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />

    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />

    <application
        android:allowBackup="true"
        android:appComponentFactory="androidx.core.app.CoreComponentFactory"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:testOnly="true"
        android:theme="@style/AppTheme"
        tools:replace="android:appComponentFactory"
        >
        <activity
            android:name=".Main"
            android:label="@string/title_activity_btapp"
            android:theme="@style/AppTheme.NoActionBar"
            tools:ignore="Instantiatable">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <!-- Needs to be explicitly declared on P+ -->
        <uses-library
            android:name="org.apache.http.legacy"
            android:required="false" />
    </application>

</manifest>

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