安卓startActivityForResult实现多个Activity之间不同跳转流程

问题描述：需要从MainActivity跳转到B，再从B跳转到C，最后从C跳回到MainActivity

先定义activity_main.xml，如下：

b.xml文件，如下：

c.xml文件，如下：

MainActivity如下：

package com.example.activitytest;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
	private Button abutton ;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        abutton = (Button)findViewById(R.id.a_button);
        abutton.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				Intent intent=new Intent();
				intent.setClass(MainActivity.this, B.class);
				startActivityForResult(intent, 1);
			}
		});
        
    }


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

B如下：

package com.example.activitytest;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class B extends Activity {
	private Button bbutton ;
	@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.b);
        bbutton = (Button)findViewById(R.id.b_button);
        bbutton.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				Intent intent=new Intent();
				intent.setClass(B.this, C.class);
				startActivityForResult(intent, 1);
			}
		});
        
    }
	@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		// TODO Auto-generated method stub
		super.onActivityResult(requestCode, resultCode, data);
		if(requestCode == 1&& resultCode == 10){
			    this.setResult(10);
			    this.finish();
			   }
	}
}

C如下：

package com.example.activitytest;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class C extends Activity {
	private Button cbutton ;
	@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.c);
        cbutton = (Button)findViewById(R.id.c_button);
        cbutton.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				C.this.setResult(10);
				C.this.finish();
			}
		});
        
    }
	@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}