两个进程之间的通信

  下面写一下我做的一个两个App进程之间的通信方式，用一个简单的例子来体现

   相当于一个加法计算器：

    首先这里需要创建两个modle,一个是客户端App，一个是服务端App

   这里用的是dataBinding的写法，所以需要在grid中写个配置

                               


还有一个自己封装的工具包：

  TypeCast:

public class TypeCast {

public static final String TAG = "TypeCast";

/**
* Convert Object to Integer
* 注：
* TypeCast.toInt(null, -1)); // Return：-1，Not：0
* TypeCast.toInt("", -1)); // Return：-1，Not：0
*
* @param value a Object
* @param defaultValue Value to return if value is null、empty or convert failure.
* @return Returns the converted value if it exists, or defaultValue
*/
public static int toInt(Object value, int defaultValue) {
if (value == null) {
return defaultValue;
}

try {
return Integer.valueOf(value.toString());
} catch (NumberFormatException e1) {
// Log.e(TAG, "toInt() Convert String to Integer, defaultValue: " + defaultValue, e1);
try {
return Double.valueOf(value.toString()).intValue();
} catch (NumberFormatException e2) {
// Log.e(TAG, "toInt() Convert String to Double, defaultValue: " + defaultValue, e2);
return defaultValue;
}
}
}

/**
* Convert Object to Long
* 注：
* TypeCast.toLong(null, -1)); // Return：-1，Not：0
* TypeCast.toLong("", -1)); // Return：-1，Not：0
*
* @param value a Object
* @param defaultValue Value to return if value is null、empty or convert failure.
* @return Returns the converted value if it exists, or defaultValue
*/
public static long toLong(Object value, long defaultValue) {
if (value == null) {
return defaultValue;
}

try {
return Long.valueOf(value.toString());
} catch (NumberFormatException e1) {
// Logger.e(TAG, "toLong() Convert String to Long, defaultValue: " + defaultValue, e1);
try {
return Double.valueOf(value.toString()).longValue();
} catch (NumberFormatException e2) {
// Logger.e(TAG, "toLong() Convert String to Double, defaultValue: " + defaultValue, e2);
return defaultValue;
}
}
}

/**
* Convert Object to Float
* 注：
* TypeCast.toFloat(null, -1.0f)); // Return：-1.0f，Not：0
* TypeCast.toFloat("", -1.0f)); // Return：-1.0f，Not：0
*
* @param value a Object
* @param defaultValue Value to return if value is null、empty or convert failure.
* @return Returns the converted value if it exists, or defaultValue
*/
public static float toFloat(Object value, float defaultValue) {
if (value == null) {
return defaultValue;
}

try {
return Float.valueOf(value.toString());
} catch (NumberFormatException e) {
// Logger.e(TAG, "toFloat() Convert String to Float, defaultValue: " + defaultValue, e);
return defaultValue;
}
}

/**
* Convert Object to Double
* 注：
* TypeCast.toDouble(null, -1.0)); // Return：-1.0，Not：0
* TypeCast.toDouble("", -1.0)); // Return：-1.0，Not：0
*
* @param value a Object
* @param defaultValue Value to return if value is null、empty or convert failure.
* @return Returns the converted value if it exists, or defaultValue
*/
public static double toDouble(Object value, double defaultValue) {
if (value == null) {
return defaultValue;
}

try {
return Double.valueOf(value.toString());
} catch (NumberFormatException e) {
// Logger.e(TAG, "toDouble() Convert String to Double, defaultValue: " + defaultValue, e);
return defaultValue;
}
}

}
  客户端：

   在这里先把values的东西写上：

   colors:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#3F51B5</color>
<color name="colorPrimaryDark">#303F9F</color>
<color name="colorAccent">#FF4081</color>
</resources>
 dimens:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<dimen name="wrapper_vertical_margin">16dp</dimen>
<dimen name="wrapper_horizontal_margin">16dp</dimen>
<dimen name="line_height">64dp</dimen>
</resources> strings:
<resources>
<string name="app_name">CalculatorClient</string>

<string name="calculator_button">求和计算</string>
<string name="calculator_result_label">结果：</string>
<string name="calculator_result">0</string>
<string name="calculator_num1_label">Num1：</string>
<string name="calculator_num2_label">Num2：</string>
</resources>
 styles:
<resources>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>

<style name="calculator_wrapper">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">@dimen/line_height</item>
<item name="android:orientation">horizontal</item>
</style>

<style name="calculator_label">
<item name="android:layout_width">0dp</item>
<item name="android:layout_height">match_parent</item>
<item name="android:layout_weight">3</item>
<item name="android:gravity">center_vertical|end</item>
<item name="android:paddingBottom">@dimen/wrapper_vertical_margin</item>
<item name="android:paddingLeft">@dimen/wrapper_horizontal_margin</item>
<item name="android:paddingRight">@dimen/wrapper_horizontal_margin</item>
<item name="android:paddingTop">@dimen/wrapper_vertical_margin</item>
<item name="android:textSize">24sp</item>
</style>

<style name="calculator_value">
<item name="android:layout_width">0dp</item>
<item name="android:layout_height">match_parent</item>
<item name="android:layout_weight">5</item>
<item name="android:gravity">center_vertical</item>
<item name="android:paddingBottom">@dimen/wrapper_vertical_margin</item>
<item name="android:paddingLeft">@dimen/wrapper_horizontal_margin</item>
<item name="android:paddingRight">@dimen/wrapper_horizontal_margin</item>
<item name="android:paddingTop">@dimen/wrapper_vertical_margin</item>
<item name="android:textSize">24sp</item>
<item name="android:inputType">number</item>
</style>

<style name="calculator_button">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">@dimen/line_height</item>
<item name="android:text">@string/calculator_button</item>
<item name="android:textSize">24sp</item>
</style>

</resources>

  主界面的 xml

  import android.app.Service;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.databinding.DataBindingUtil;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;

import com.bwei.czx.service.IMyAidlInterface;
import com.bwei.czx.service33.databinding.ActivityMainBinding;

public class MainActivity extends AppCompatActivity {
ActivityMainBinding mainBinding;
IMyAidlInterface mInterface;
ServiceConnection mConn = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
mInterface = IMyAidlInterface.Stub.asInterface(iBinder);
}

@Override
public void onServiceDisconnected(ComponentName componentName) {
mInterface = null;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mainBinding = DataBindingUtil.setContentView(this, R.layout.activity_main);

Intent intent = new Intent();

//这里写服务类的包名和包名.类名
intent.setComponent(new ComponentName("com.czx.service","com.czx.service.CalculatorService"));
bindService(intent,mConn, Service.BIND_AUTO_CREATE);

mainBinding.calculatorButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int num1 = TypeCast.toInt(mainBinding.etNum1.getText().toString(),0);
int num2 = TypeCast.toInt(mainBinding.etNum2.getText().toString(),0);
Log.i("=======","num1="+num1+"num2="+num2);
try {
if(mInterface != null){
int result = mInterface.add(num1,num2);
mainBinding.tvResult.setText(String.valueOf(result));
}
} catch (RemoteException e) {
e.printStackTrace();
}
}
});
}

@Override
protected void onDestroy() {
if(mInterface != null){
unbindService(mConn);
}
super.onDestroy();
}
}

MainActivity中：

import android.app.Service;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.databinding.DataBindingUtil;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;

import com.bwei.czx.service.IMyAidlInterface;
import com.bwei.czx.service33.databinding.ActivityMainBinding;

public class MainActivity extends AppCompatActivity {
ActivityMainBinding mainBinding;
IMyAidlInterface mInterface;

ServiceConnection mConn = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
mInterface = IMyAidlInterface.Stub.asInterface(iBinder);
}

@Override
public void onServiceDisconnected(ComponentName componentName) {
mInterface = null;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mainBinding = DataBindingUtil.setContentView(this, R.layout.activity_main);

Intent intent = new Intent();
//输入包名，第二个输入包名.服务端那边的服务名
intent.setComponent(new ComponentName("com.bwei.czx.service","com.bwei.czx.service.CalculatorService"));
bindService(intent,mConn, Service.BIND_AUTO_CREATE);

mainBinding.calculatorButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int num1 = TypeCast.toInt(mainBinding.etNum1.getText().toString(),0);
int num2 = TypeCast.toInt(mainBinding.etNum2.getText().toString(),0);
Log.i("=======","num1="+num1+"num2="+num2);
try {
//防御性判断
if(mInterface != null){
int result = mInterface.add(num1,num2);
mainBinding.tvResult.setText(String.valueOf(result));
}
} catch (RemoteException e) {
e.printStackTrace();
}
}
});
}

@Override
protected void onDestroy() {
if(mInterface != null){
unbindService(mConn);
}
super.onDestroy();
}
}

  服务端：
   CalculatorService

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;

public class CalculatorService extends Service {
private IBinder mBinder = new IMyAidlInterface.Stub() {
@Override
public int add(int num1, int num2) throws RemoteException {
return num1 + num2;
}
};
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
}
然后在服务端创建一个aidl
                  


interface IMyAidlInterface {
int add(int num1,int num2);
}


之后把服务端创建的aidl复制，粘贴到客户端里面。

写完就可以运行了。