前一个activity跳转到后一个activity设置code:

Intent intent=new Intent(MainActivity.this,ActivityTwo.class);
                startActivityForResult(intent,0x123);

重写前一个activity的onActivityResult方法:

@Override
    protected void onActivityResult(int requestCode,int resultCode,Intent data){
        super.onActivityResult(requestCode,resultCode,data);

        if(requestCode==0x123 && resultCode==0x123){
            Bundle bundle=data.getExtras();
            String test=bundle.getString("test");
            Log.i("HelloWorld",test);
        }
    }

后一个activity跳转到前一个activity设置code:

Intent intent=getIntent();
                Bundle bundle=new Bundle();
                bundle.putString("test","zqx");
                intent.putExtras(bundle);
                setResult(0x123,intent);
                finish();

 

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