Android(安卓)Studio AIDL创建案例(解决自动生成java问题)
16lz
2021-01-26
AIDL创建
新建Aidldemo项目
选中APP-右键-new-AIDL-AIDL file
会出现一个aidl目录,但是注意此时还没有生成对应的java文件,如下图所示
点击Build-Clean Project(Rebuild 也可以),aidl对应的java文件就会出现了
写个加法计算器
更改aidl目录下的aidl文件如下:
interface IAdditionService { int add(in int x, in int y);}
在MainActivity同级目录下,创建一个Service
更改代码如下:
public class AdditionService extends Service { public AdditionService() { } @Override public IBinder onBind(Intent intent) { // TODO: Return the communication channel to the service. return mBinder; } IAdditionService.Stub mBinder = new IAdditionService.Stub() { @Override public int add(int x, int y) throws RemoteException { return x + y; } };}
写个简单的布局,输入两个加数,点击按钮相加,并输出结果
```
- 修改MainActivity的代码
public class MainActivity extends AppCompatActivity { IAdditionService mService; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null).show(); } }); Intent intentService = new Intent(this,AdditionService.class); bindService(intentService, mConnection, Context.BIND_AUTO_CREATE); } ServiceConnection mConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { mService = IAdditionService.Stub.asInterface(service); } @Override public void onServiceDisconnected(ComponentName name) { } }; public void add(View view) throws RemoteException { EditText et1 = (EditText) findViewById(R.id.et_num1); EditText et2 = (EditText) findViewById(R.id.et_num2); TextView tv = (TextView) findViewById(R.id.tv); int x = Integer.parseInt(et1.getText().toString()); int y = Integer.parseInt(et2.getText().toString()); int result = mService.add(x, y); tv.setText(result +""); }}
结果
新建另一个项目,来启动这个远程服务
新建StartAdd 项目,在该项目启动Aidldemo中的加法服务,布局照抄上面那个项目
不过这个项目因为没有Service的类,所以要在之前的那个项目中,加上隐式启动服务的过滤器
注意:该项目新建的aidl要和之前项目的aidl包名以及文件内容要一模一样,所以这时不能右键新建AIDL file了(因为,这样默认的包名是当前项目的包名,和之前的aidl的文件的package是不符的)。因此要:
- 新建一个包,名字和上面项目Aidl所在的包名一致
- 把上面那个项目的aidl文件直接拷到这个包里面
- Clean Project ,自动生成相应的java文件
修改MainActivity:
public class MainActivity extends AppCompatActivity { IAdditionService mService; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null).show(); } }); Intent intent = new Intent(); intent.setAction("com.guanhang.add"); bindService(intent, mConnection, Context.BIND_AUTO_CREATE); } ServiceConnection mConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { mService = IAdditionService.Stub.asInterface(service); } @Override public void onServiceDisconnected(ComponentName name) { } }; public void add(View view) throws RemoteException { EditText et1 = (EditText) findViewById(R.id.et_num1); EditText et2 = (EditText) findViewById(R.id.et_num2); TextView tv = (TextView) findViewById(R.id.tv); int x = Integer.parseInt(et1.getText().toString()); int y = Integer.parseInt(et2.getText().toString()); int result = mService.add(x, y); tv.setText(result +""); }}
运行结果:
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