Android(安卓)startActivityForResult 和 setResult的使用
16lz
2021-01-26
在Android中startActivityForResult主要作用就是:
A-Activity需要在B-Activtiy中执行一些数据操作,而B-Activity又要将,执行操作数据的结果返回给A-Activtiy
//看效果
//看代码
[java] view plain copy- packagesn.len.actres;
- importandroid.app.Activity;
- importandroid.content.Intent;
- importandroid.os.Bundle;
- importandroid.view.View;
- importandroid.view.View.OnClickListener;
- importandroid.widget.Button;
- importandroid.widget.TextView;
- publicclassActivityResultDemoActivityextendsActivity
- {
- privateButtonbutton_start_task;
- privateTextViewTextView_result;
- @Override
- publicvoidonCreate(BundlesavedInstanceState)
- {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- button_start_task=(Button)findViewById(R.id.button_start_task);
- TextView_result=(TextView)findViewById(R.id.TextView_result);
- button_start_task.setOnClickListener(newbutton_start_task_Listener());
- }
- privateclassbutton_start_task_ListenerimplementsOnClickListener
- {
- publicvoidonClick(Viewv)
- {
- Intentintent=newIntent(ActivityResultDemoActivity.this,SimpleTaskActivity.class);
- //关键点来了,使用startActivityForResult来启动
- startActivityForResult(intent,100);
- }
- }
- /**
- *复写onActivityResult,这个方法
- *是要等到SimpleTaskActivity点了提交过后才会执行的
- */
- @Override
- protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata)
- {
- //可以根据多个请求代码来作相应的操作
- if(20==resultCode)
- {
- Stringbookname=data.getExtras().getString("bookname");
- Stringbooksale=data.getExtras().getString("booksale");
- TextView_result.setText("书籍名称:"+bookname+"书籍价钱"+booksale+"元");
- }
- super.onActivityResult(requestCode,resultCode,data);
- }
- }
//任务处理类 [java] view plain copy
- packagesn.len.actres;
- importandroid.app.Activity;
- importandroid.content.Intent;
- importandroid.os.Bundle;
- importandroid.view.View;
- importandroid.view.View.OnClickListener;
- importandroid.widget.Button;
- importandroid.widget.EditText;
- publicclassSimpleTaskActivityextendsActivity
- {
- privateEditTextEditText_bookname;
- privateEditTextEditText_booksale;
- privateButtonButton_task_fulfill;
- @Override
- protectedvoidonCreate(BundlesavedInstanceState)
- {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main2);
- EditText_bookname=(EditText)findViewById(R.id.EditText_bookname);
- EditText_booksale=(EditText)findViewById(R.id.EditText_booksale);
- Button_task_fulfill=(Button)findViewById(R.id.Button_task_fulfill);
- Button_task_fulfill.setOnClickListener(newButton_task_fulfill_Listener());
- }
- privateclassButton_task_fulfill_ListenerimplementsOnClickListener
- {
- publicvoidonClick(Viewv)
- {
- Stringstr_bookname=EditText_bookname.getText().toString();
- Stringstr_booksale=EditText_booksale.getText().toString();
- //判断空,我就不判断了。。。。
- Intentdata=newIntent();
- data.putExtra("bookname",str_bookname);
- data.putExtra("booksale",str_booksale);
- //请求代码可以自己设置,这里设置成20
- setResult(20,data);
- //关闭掉这个Activity
- finish();
- }
- }
- }
摘自:http://blog.csdn.net/yanglian20009/article/details/7238995 和 http://www.cnblogs.com/mubai/archive/2011/09/21/2183816.html
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