Question

我使用此代码将EditText（名称）的内容保存到数组中，我希望然后在另一个活动的列表视图中显示此数组。任何的想法？谢谢

SingleItemView：

ArrayList<String> addArray = new  ArrayList<String>();
Intent intent = new Intent(SingleItemView.this, mygardenMain.class);
Bundle bundle =new Bundle();

public void onClick(View v) {
        String getInput = txt.getText().toString();

        if (addArray.contains(getInput)){
            Toast.makeText(SingleItemView.this,"Plant Already Added",Toast.LENGTH_SHORT).show();
        }
        else if (getInput == null || getInput.trim().equals("")){
            Toast.makeText(SingleItemView.this,"No Plant Selected",Toast.LENGTH_SHORT).show();
        }
        else
        {
            addArray.add(getInput);
            Toast.makeText(SingleItemView.this,"Plant Added",Toast.LENGTH_SHORT).show();
            bundle.putStringArrayList("addArray",addArray);

intent.putExtras(bundle);
                startActivity(intent);

mygarden主要代码：

public class mygardenMain extends Activity {

private ListView list;
private ArrayList<String> addArray;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mygarden_list);
    list = (ListView) findViewById(R.id.mygardenlist);


    Bundle bundle = getIntent().getExtras();
    ArrayList<String> addArray = bundle.getStringArrayList("addArray");


    ArrayAdapter<String> adapter = new ArrayAdapter<String>(mygardenMain.this,           android.R.layout.simple_list_item_1, addArray);
    list.setAdapter(adapter);


    }
    }

Answer 1

使用以下代码执行此操作。将String数组从一个Activity发送到下一个Activity。

 String[] stringArray = new String[10];
 Intent intent  = new Intent(MainActivity.this,MyDrawing.class);
 Bundle bundle =new Bundle();
 bundle.putStringArray("stringArray",stringArray);
 intent.putExtras(bundle);
 startActivity(intent);

并在下一个活动中从下一个活动中搜索数组，如下所示：

 Bundle bundle = getIntent().getExtras();
 String[] stringArray = bundle.getStringArray("stringArray");

您可以将Array List直接传递给Intent

 ArrayList<String> arraylist = new ArrayList<String>();
 Intent intent = new Intent(MainActivity.this, MyDrawing.class);
 Bundle bundle = new Bundle();
 bundle.putStringArrayList("arraylist",arraylist);
 intent.putExtras(bundle);
 startActivity(intent);

并检索如下：

Bundle bundle = getIntent().getExtras();
ArrayList<String> arraylist = bundle.getStringArrayList("arraylist");

Answer 2

使用Parcelable在活动之间发送和接收数据。

发送

intent.putParcelableArrayListExtra("key", ArrayList<T extends Parcelable> list);
startActivity(intent);

收到，

getIntent().getParcelableArrayListExtra("key");

最后设置了listview适配器。

Answer 3

public class BasicViews5Activity extends ListActivity {
 String[] presidents = {
 “Dwight D. Eisenhower”,
 “John F. Kennedy”,
 “Lyndon B. Johnson”,
 “Richard Nixon”,
 “Gerald Ford”,
 “Jimmy Carter”,
 “Ronald Reagan”,
 “George H. W. Bush”,
 “Bill Clinton”,
 “George W. Bush”,
 “Barack Obama”
 };

 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 //---no need to call this---
 //setContentView(R.layout.main);
 setListAdapter(new ArrayAdapter<String>(this,
 android.R.layout.simple_list_item_1, presidents));
 }

 public void onListItemClick(
 ListView parent, View v, int position, long id)
 {
 Toast.makeText(this,
 “You have selected “ + presidents[position],
 Toast.LENGTH_SHORT).show();
 }
}

希望这会有所帮助 String {}总统是数组

Answer 4

我认为这就是你想要的：

自： https://developer.android.com/training/basics/firstapp/starting-activity.html

建立意图 Intent是一个在不同组件之间提供运行时绑定的对象（例如两个活动）。 Intent代表一个应用程序＆＃34;意图做某事。＆＃34;您可以将意图用于各种任务，但在本课程中，您的意图将开始另一项活动。

在MainActivity.java中，将下面显示的代码添加到sendMessage（）：

public class MainActivity extends AppCompatActivity {
    public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    /** Called when the user clicks the Send button */
    public void sendMessage(View view) {
        Intent intent = new Intent(this, DisplayMessageActivity.class);
        EditText editText = (EditText) findViewById(R.id.edit_message);
        String message = editText.getText().toString();
        intent.putExtra(EXTRA_MESSAGE, message);
        startActivity(intent);
    }
}

这是你将android中的String传递给下一个活动的方法。这可以适用于通过for循环在数组中添加一个或多个数组或对象或字符串。

Answer 5

试试这个。

首先将ArrayList转换为数组，然后传递给下一个活动

String [] arrrayData = addArray.toArray（new String [addArray.size（）]）;

得到这样的

String[] array;
 Intent intent  = new Intent(MainActivity.this,MyDrawing.class);
 Bundle bundle =new Bundle();
 bundle.putStringArray("array",array);
 intent.putExtras(bundle);
 startActivity(intent);

100％正常工作

Answer 6

请具体说明你的问题。其次ListView已经过时了，我建议你使用Recycler view

 private RecyclerAdapter ra;
 private ArrayList<ModalClassName> yourarraylistname;


    recyclerView = (RecyclerView) findViewById(R.id.recyclerdown);
    recyclerView.setHasFixedSize(true);

    layoutManager = new LinearLayoutManager(this);
    recyclerView.setLayoutManager(layoutManager);
    recyclerView.setItemAnimator(new DefaultItemAnimator());
   yourarraylistname =new ArrayList<ModalClassName>();
  //make sure yourarraylistname has some value
    ra = new DownloadAdapter(this,yourarraylistname);
    recyclerView.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.VERTICAL));
    recyclerView.setAdapter(ra);

Answer 7

请在github上查看我的ListView示例项目。这是链接

https://github.com/SanjayKushwah0601/ListView-Example

您可以通过意图传递ArrayList

Intent intent = new Intent(MainActivity.this, ListActivity.class);
                    intent.putStringArrayListExtra("list", addArray);
                    startActivity(intent);

然后你可以在另一个屏幕上获取这个ArrayList

// Now fetch the contents from intent
        addArray = getIntent().getStringArrayListExtra("list");

        ArrayAdapter<String> adapter = new ArrayAdapter<>(ListActivity.this, android.R.layout.simple_list_item_1, addArray);
        list.setAdapter(adapter);

如何保存到数组并在listview中显示数组

7 个答案: