java - 从 ListView 启动新 Activity

Question

因此，我设置了一个 ListView ，它从 strings.xml 文件中的字符串数组中填充自身，但我似乎不知道如何对其进行编码，以便点击/单击列表启动一个新 Activity 。我知道这个主题已经存在，但似乎我以不同的方式设置我的 ListView ，因此所提供的解决方案不兼容。这是我的 mainactivity.java 代码:

public class MainActivity extends AppCompatActivity implements OnClickListener {
Map<String, Integer> mapIndex;
ListView consoleList;
/**
 * ATTENTION: This was auto-generated to implement the App Indexing API.
 * See https://g.co/AppIndexing/AndroidStudio for more information.
 */
private GoogleApiClient client;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    String[] consoles = getResources().getStringArray(R.array.consoles_array);

    Arrays.asList(consoles);

    consoleList = (ListView) findViewById(R.id.list_consoles);
    consoleList.setAdapter(new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1, consoles));

    getIndexList(consoles);

    displayIndex();
    // ATTENTION: This was auto-generated to implement the App Indexing API.
    // See https://g.co/AppIndexing/AndroidStudio for more information.
    client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
}

private void getIndexList(String[] consoles) {
    mapIndex = new LinkedHashMap<String, Integer>();
    for (int i = 0; i < consoles.length; i++) {
        String console = consoles[i];
        String index = console.substring(0, 1);

        if (mapIndex.get(index) == null)
            mapIndex.put(index, i);
    }
}

private void displayIndex() {
    LinearLayout indexLayout = (LinearLayout) findViewById(R.id.side_index);

    TextView textView;
    List<String> indexList = new ArrayList<String>(mapIndex.keySet());
    for (String index : indexList) {
        textView = (TextView) getLayoutInflater().inflate(
                R.layout.side_index_item, null);
        textView.setText(index);
        textView.setOnClickListener(this);
        indexLayout.addView(textView);
    }
}

public void onClick(View view) {
    TextView selectedIndex = (TextView) view;
    consoleList.setSelection(mapIndex.get(selectedIndex.getText()));
}


@Override
public void onStart() {
    super.onStart();

    // ATTENTION: This was auto-generated to implement the App Indexing API.
    // See https://g.co/AppIndexing/AndroidStudio for more information.
    client.connect();
    Action viewAction = Action.newAction(
            Action.TYPE_VIEW, // TODO: choose an action type.
            "Main Page", // TODO: Define a title for the content shown.
            // TODO: If you have web page content that matches this app activity's content,
            // make sure this auto-generated web page URL is correct.
            // Otherwise, set the URL to null.
            Uri.parse("http://host/path"),
            // TODO: Make sure this auto-generated app deep link URI is correct.
            Uri.parse("android-app://com.tylerfrisbee.gamerguide/http/host/path")
    );
    AppIndex.AppIndexApi.start(client, viewAction);
}

@Override
public void onStop() {
    super.onStop();

    // ATTENTION: This was auto-generated to implement the App Indexing API.
    // See https://g.co/AppIndexing/AndroidStudio for more information.
    Action viewAction = Action.newAction(
            Action.TYPE_VIEW, // TODO: choose an action type.
            "Main Page", // TODO: Define a title for the content shown.
            // TODO: If you have web page content that matches this app activity's content,
            // make sure this auto-generated web page URL is correct.
            // Otherwise, set the URL to null.
            Uri.parse("http://host/path"),
            // TODO: Make sure this auto-generated app deep link URI is correct.
            Uri.parse("android-app://com.tylerfrisbee.gamerguide/http/host/path")
    );
    AppIndex.AppIndexApi.end(client, viewAction);
    client.disconnect();
}

}

Answer 1

您可以调用setOnItemClickListener在 ListView 上:

consoleList.setOnItemClickListener(new AdapterView.OnItemClickListener(){
  @Override
  public void onItemClick(AdapterView<?> parent, View view, int position, long id){
    //do whatever you want to do if you want to start a new Activity:
    Intent intent = new Intent(MainActivity.this, MyActivity.class);
    startActivity(intent);
  }
});

当您单击 ListView 中的项目时，这应该填充 onItemClick 方法，并且如果您想要这样做，则应该调用您的 onClick 方法。