安卓学习-activity-窗体调用和传参

主要是传递自定义对象

 窗体A

窗体B

窗体A调用窗体B，B确定后回调A方法

MainActivity

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        Button btn=(Button)findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                Intent in=new Intent(MainActivity.this,Activity1.class);
                Bundle bundle=new Bundle();
                //传递boolean
                bundle.putBoolean("boolean", true);
                bundle.putStringArray("strings", new String[]{"苹果","鸭梨","香蕉"});
                
                ArrayList<HashMap<String, Object>> usersMap = new ArrayList<HashMap<String, Object>>();
                for(int i=0;i<2;i++){
                    HashMap<String, Object> a=new HashMap<String, Object>();
                    a.put("id", i);
                    a.put("user"+i, new User("XXX"+i,i));
                    usersMap.add(a);
                }
                bundle.putSerializable("usersMap", usersMap);

                ArrayList<User> users=new ArrayList<User>();
                for(int i=0;i<2;i++){
                    User user=new User("XXX"+i,i);
                    users.add(user);
                }
                bundle.putSerializable("users", users);
                User user=new User("XXX",1);
                bundle.putSerializable("user", user);
                
                in.putExtras(bundle);
                startActivityForResult(in, 100);
            }
        });
        
    }
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if((requestCode==100)&&(resultCode==100)){
            
            Toast.makeText(MainActivity.this, data.getStringExtra("msg"), Toast.LENGTH_SHORT).show();
        }
    }
}

Activity1

public class Activity1 extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_activity1);
        
        Intent in=getIntent();
        Bundle ble=in.getExtras();
        
        EditText et=(EditText)findViewById(R.id.editText1);
        String str="boolean:"+ble.getBoolean("boolean")+"
";
        str=str+"数组:"+ble.getStringArray("strings")[0].toString()+"
";
        
        ArrayList<HashMap<String, Object>> usersMap=(ArrayList<HashMap<String, Object>>)ble.getSerializable("usersMap");
        str=str+"Map的List:"+usersMap.toString()+"
";
        
        ArrayList<User> users=(ArrayList<User>)ble.getSerializable("users");
        str=str+"User的List:"+users.toString()+"
";
        
        User user=(User)ble.getSerializable("user");
        str=str+"对象:"+user.toString()+"
";
        
        et.setText(str);
        
        Button btn=(Button)findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                Intent in=new Intent();
                in.putExtra("msg", "成功222");
                setResult(100,in);
                finish();
            }
        });

    }
}