实施例

Question

我想将字符串从一个活动传递到另一个活动。在第二个活动中，字符串应该是可读的。

listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
First actvity code
        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int position,
                                long id) {

            // TODO Auto-generated method stub

            Intent dash_des = new Intent(getApplicationContext(),Dashboard_Description__page.class);

           //here should be t my string


        }
    });
 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_dashboard__description__page);

        //here i want to read the string data
        }

Answer 1

你应该阅读Android中的Intents。

您可以使用以下方法实现此目的：

Intent myIntent = new Intent(FirstActivity.this,SecondActivity.class);
myIntent.putExtra("TestString","TestValue");
startActivity(myIntent);

上面的代码将启动SecondActivity。现在在第二个活动的onCreate（）中你需要：

String stringCameFromFirstAcvitity = getIntent().getStringExtra("TestString");

stringCameFromFirstAcvitity的值为“TestValue”

在你的情况下

listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
//First actvity code
    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int position,
                            long id) {

        // TODO Auto-generated method stub

    Intent dash_des = new Intent(getApplicationContext(),Dashboard_Description__page.class);
    Object obj = listview.getAdapter().getItem(position);
    String value = obj.toString();
    dash_des .putExtra("TestString",value);
    startActivity(dash_des );
    }
});

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_dashboard__description__page);

    //here i want to read the string data
    }

secondActivity的代码保持不变。希望它有所帮助

Answer 2

Intent dash_des = new Intent(getApplicationContext(),Dashboard_Description__page.class);

dash_des.putString("your_key", your_string_variable);
startActivity(dash_des);

在第二项活动中：

Bundle bundle = getIntent().getExtras();
String text = bundle.getString("your_key");

Answer 3

当有多个字符串需要从一个活动传递到另一个活动时，最好将它们捆绑并传递给下一个活动。像这样：

Intent in = new Intent(Firstactivity.this, Secondactivity.class);
    Bundle mbundle = new Bundle();
    mbundle.putString("name", name);
    mbundle.putString("phonenumber", phonenumber);
    in.putExtras(mbundle);

并且它们可以从第二个活动中检索到如下，

 Bundle bundle = getIntent().getExtras();
 String name= bundle.getString("name");
 String phoneNumber= bundle.getString("phonenumber");

Answer 4

在意图中将extring作为额外的..

然后将其保留在activity2

中

实施例

Intent intent = new Intent(current.this, Activity2.class);
intent.putExtra("key","value");
startActivity(intent);

活动2中的

：

String data = getIntent().getExtras().getString("key");

如何将字符串从一个活动传递到另一个活动

4 个答案:

实施例