如何把一个listview中选中的值展示到另外一个 activity中

淩亂°似流年 2022-08-06 06:05 169阅读 0赞

我正在创建一个简单的app,有一个功能是从第一个listView中取到选中的值展示到第二个activity中，中间是用了Intent传递，但是现在有个问题时我不知道如何才能在第二个activity中。

MainActivity.java

package com.devleb.listviewdemo;
     
    import android.app.ListActivity;
    import android.content.Intent;
    import android.os.Bundle;
    import android.view.Menu;
    import android.view.View;
    import android.widget.ArrayAdapter;
    import android.widget.ListView;
    import android.widget.TextView;
     
    public class MainActivity extends ListActivity {
        TextView txt;
        private static final String[] items = { "doctor", "engineer", "lawer",
                "developer", "employee", "business man", "auditer", "cashier" };
     
     
     
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            setListAdapter(new ArrayAdapter<String>(this,
                    android.R.layout.simple_list_item_1, items));
            txt = (TextView) findViewById(R.id.txt);
     
        }
     
        @Override
        protected void onListItemClick(ListView l, View v, int position, long id) {
            // TODO Auto-generated method stub
            super.onListItemClick(l, v, position, id);
     
            // txt.setText(items[position]);
     
            Intent i = new Intent(this, SecondActivity.class);
            i.putExtra("testonArray", items);
            startActivity(i);
        }
     
        @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;
        }
     
    }
    SecondActivity.java
    
    package com.devleb.listviewdemo;
     
    import android.os.Bundle;
    import android.app.Activity;
    import android.view.Menu;
    import android.widget.EditText;
    import android.widget.TextView;
     
    public class SecondActivity extends Activity {
     
        TextView txt;
     
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_second);
     
            Bundle extras=getIntent().getExtras();
            String [] values = extras.getStringArray ("testonArray");
            txt = (TextView) findViewById (R.id.txt2);
            if (values != null && values.length > 0 && txt != null){
               txt.setText(values [0]);
            }
     
            }
     
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.second, menu);
            return true;
        }
     
    }

### 处理方法 ###

First Activity的代码:

+@Override
        protected void onListItemClick(ListView l, View v, int position, long id) {
            // TODO Auto-generated method stub
            super.onListItemClick(l, v, position, id);
     
            // txt.setText(items[position]);
     
            // Try to send the items[position] in the intent
            Intent i = new Intent(this, SecondActivity.class);
            i.putExtra("testonArray", items[position].toString());
            startActivity(i);
        }

第二个activity代码

Bundle extras=getIntent().getExtras();
       String selected_item=extras.getString("testonArray");
       txt = (TextView) findViewById (R.id.txt2);
       txt.setText(selected_item);

原文地址：[http://www.itmmd.com/201411/215.html ][http_www.itmmd.com_201411_215.html]  
该文章由 [萌萌的IT人][IT] 整理发布,转载须标明出处。

[http_www.itmmd.com_201411_215.html]: http://www.itmmd.com/201411/215.html
[IT]: http://www.itmmd.com/