Android硬件访问服务---APK编写

最新推荐文章于 2025-06-28 11:25:25 发布

原创最新推荐文章于 2025-06-28 11:25:25 发布 · 554 阅读

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本文介绍了一个简单的Android应用程序，该程序使用自定义按钮和复选框来控制LED灯的开关状态，并通过`ILedService`接口与底层硬件交互。

开发环境：AndroidStudio2.0，MainActivity.java源码如下：

package mobiletek.leddemo;

import android.os.RemoteException;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.widget.CheckBox;
import android.widget.Toast;
import android.os.ILedService;
import android.os.ServiceManager;

public class MainActivity extends AppCompatActivity {
    private boolean ledon = false;
    private Button button = null;
    private ILedService iLedService = null;

    private CheckBox checkBoxLed1 = null;
    private CheckBox checkBoxLed2 = null;
    private CheckBox checkBoxLed3 = null;
    private CheckBox checkBoxLed4 = null;

    int []ledctrl = {0x12, 0x34, 0x56, 0x78};

    class MyButtonListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            ledon = !ledon;
            if (ledon) {
                button.setText("ALL OFF");
                checkBoxLed1.setChecked(true);
                checkBoxLed2.setChecked(true);
                checkBoxLed3.setChecked(true);
                checkBoxLed4.setChecked(true);

                try {
                    for (int i = 0; i < 4; i++)
                        iLedService.ledCtrl(ledctrl[i], 1);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            else {
                button.setText("ALL ON");
                checkBoxLed1.setChecked(false);
                checkBoxLed2.setChecked(false);
                checkBoxLed3.setChecked(false);
                checkBoxLed4.setChecked(false);

                try {
                    for (int i = 0; i < 4; i++)
                        iLedService.ledCtrl(ledctrl[i], 0);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public void onCheckboxClicked(View view) {
        // Is the view now checked?
        boolean checked = ((CheckBox) view).isChecked();

        // Check which checkbox was clicked
        try {
            switch(view.getId()) {
                case R.id.LED1:
                    if (checked) {
                        Toast.makeText(getApplicationContext(), "LED1 on", Toast.LENGTH_SHORT).show();
                        iLedService.ledCtrl(ledctrl[0], 1);
                    }
                    else {
                        Toast.makeText(getApplicationContext(), "LED1 off", Toast.LENGTH_SHORT).show();
                        iLedService.ledCtrl(ledctrl[0], 0);
                    }
                    break;
                case R.id.LED2:
                    if (checked) {
                        Toast.makeText(getApplicationContext(), "LED2 on", Toast.LENGTH_SHORT).show();
                        iLedService.ledCtrl(ledctrl[1], 1);
                    }
                    else {
                        Toast.makeText(getApplicationContext(), "LED2 off", Toast.LENGTH_SHORT).show();
                        iLedService.ledCtrl(ledctrl[1], 0);
                    }
                    break;

                case R.id.LED3:
                    if (checked) {
                        Toast.makeText(getApplicationContext(), "LED3 on", Toast.LENGTH_SHORT).show();
                        iLedService.ledCtrl(ledctrl[2], 1);
                    }
                    else {
                        Toast.makeText(getApplicationContext(), "LED3 off", Toast.LENGTH_SHORT).show();
                        iLedService.ledCtrl(ledctrl[2], 0);
                    }
                    break;

                case R.id.LED4:
                    if (checked) {
                        Toast.makeText(getApplicationContext(), "LED4 on", Toast.LENGTH_SHORT).show();
                        iLedService.ledCtrl(ledctrl[3], 1);
                    }
                    else {
                        Toast.makeText(getApplicationContext(), "LED4 off", Toast.LENGTH_SHORT).show();
                        iLedService.ledCtrl(ledctrl[3], 0);
                    }
                    break;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        button = (Button)findViewById(R.id.BUTTON);
        iLedService = ILedService.Stub.asInterface(ServiceManager.getService("led"));

        checkBoxLed1 = (CheckBox) findViewById(R.id.LED1);
        checkBoxLed2 = (CheckBox) findViewById(R.id.LED2);
        checkBoxLed3 = (CheckBox) findViewById(R.id.LED3);
        checkBoxLed4 = (CheckBox) findViewById(R.id.LED4);

        button.setOnClickListener(new MyButtonListener());
    }
}

将编译生成的out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes.jar文件放到工程的根目录下，点击File->Project Structure，在弹出的界面中点击"+"号按钮新建Module，Module类型选择Import .JAR/.AAR Package，接下来的界面中File name选择刚才的classes.jar，最后点击Finish结束。
回到Project Structure界面中，点击左侧的app，选中右侧的Dependencies，再点击右侧的"+"号，选中"Module dependency"，在弹出的界面中点击OK完成，回到Project Structure界面，选择中间的:classes，Scope选择Provided，点击OK完成。

修改配置文件：
1.app/build.gradle文件：
apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"

    defaultConfig {
        applicationId "mobiletek.leddemo"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"

+      // Enabling multidex support.
+      multiDexEnabled true
    }
+ dexOptions {
+     javaMaxHeapSize "4g"
+ }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:25.1.0'
    compile project(':classes')
+ compile 'com.android.support:multidex:1.0.0'
}

2.修改app/src/main/AndroidManifest.xml文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="mobiletek.leddemo">

    <application
+      android:name="android.support.multidex.MultiDexApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>