Android 多进程编程 15问15答！

ps：阅读本文 需要对android 多进程编程有一定了解。

1.Android中总共有几种方式进行IPC?

答：一共有两种，一种是binder 还有一种是socket。Binder 大家用的比较多。Socket很少有人用，这里给出一个利用Socket进行ipc通信的例子。

服务端代码：

package com.example.administrator.bindermanager;

import android.os.Bundle;
import android.os.RemoteException;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import org.w3c.dom.Text;

public class MainActivity extends AppCompatActivity {

private Button bt, bt2, bt3;
private EditText et1, et2;
private TextView tv;
private BinderManger binderManger;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.tv2);
et1 = (EditText) findViewById(R.id.et);
et2 = (EditText) findViewById(R.id.et2);
bt = (Button) this.findViewById(R.id.bt);
bt.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
binderManger = BinderManger.getInstance(MainActivity.this);
}
});

bt2 = (Button) this.findViewById(R.id.bt2);
bt2.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
try {
final IMultiplication multiplicationImpl =
(IMultiplication) MultiplicationImpl.asInterface(binderManger.queryBinder(BinderManger.BINDER_MULTIPLICATION));

runOnUiThread(new Runnable() {
@Override
public void run() {
try {
tv.setText(multiplicationImpl.multip(Integer.parseInt(et1.getText().toString()), Integer.parseInt(et2.getText().toString())) + "");
} catch (RemoteException e) {
e.printStackTrace();
}
}
});

} catch (RemoteException e) {
e.printStackTrace();
}
}
});

bt3 = (Button) this.findViewById(R.id.bt3);
bt3.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
try {
final IAddition additionImpl =
(IAddition) AdditionImpl.asInterface(binderManger.queryBinder(BinderManger.BINDER_ADDITION));
runOnUiThread(new Runnable() {
@Override
public void run() {
try {
tv.setText(additionImpl.add(Integer.parseInt(et1.getText().toString()), Integer.parseInt(et2.getText().toString())) + "");
} catch (RemoteException e) {
e.printStackTrace();
}
}
});

} catch (RemoteException e) {
e.printStackTrace();
}
}
});

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();
}
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();

//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}

return super.onOptionsItemSelected(item);
}
}

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