Question

我有一个ListActivity，我想以编程方式设置我的布局中的TextView文本，我需要对我的所有行执行此操作。

此TextView将在ListActivity的每一行显示当前Locale的Currency Simbol。

代码段：

DepositoRepository repo = new DepositoRepository(this);
Cursor c = repo.getCursor();
adapter = new SimpleCursorAdapter(this, R.layout.deposito_list, c,
    new String[] { Deposito.COLUNA_VALOR, Deposito.COLUNA_DATA },
    new int[] { R.id.tvValorDeposito, R.id.tvDataDeposito });
setListAdapter(adapter);

我想要的所有行：

Currency moeda = Currency.getInstance(Locale.getDefault());
TextView tvMoeda = (TextView)findViewById(R.id.tvMoeda);
tvMoeda.setText(moeda.getSymbol(Locale.getDefault()));

Answer 1

您可以将自定义适配器用于listView。如果你想我可以编辑我的答案并告诉你如何做到这一点。这可以让你走上正轨。将此代码调整为您的应用程序。从您的活动中调用setListAdapter（适配器），适配器是您的自定义适配器。

希望这有帮助！

编辑：

import java.util.Currency;
import java.util.Locale;

import android.content.Context;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CursorAdapter;
import android.widget.TextView;

public class CustomAdapter extends CursorAdapter{

    public CustomAdapter(Context context, Cursor c) {
        super(context, c);
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        Currency moeda = Currency.getInstance(Locale.getDefault());
        TextView tvMoeda = (TextView)view.findViewById(R.your_id);//your textView id here
        tvMoeda.setText(moeda.getSymbol(Locale.getDefault()));
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        LayoutInflater inflater = LayoutInflater.from(context);
        View v = inflater.inflate(R.layout.item, parent, false);//your layout here
        bindView(v, context, cursor);
        return v;
    }

}

Answer 2

显示所有内部音乐文件（铃声等）列表的简单示例活动。

MyActivity.java

public class MyActivity extends Activity {
    private MyCursorAdapter mAdapter;

    // that's what we want to know from the database
    private static final String[] PROJECTION = new String[] {
        MediaStore.Audio.AudioColumns._ID,   // 0 - _id must be present
        MediaStore.Audio.AudioColumns.TITLE, // 1
        MediaStore.Audio.AudioColumns.DATA   // 2
    };
    // those from above - no need for cursor.getColumnIndex()
    private static final int TITLE_IDX = 1;
    private static final int TEXT_IDX = 2;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        ListView lv = (ListView) findViewById(R.id.list_view);
        mAdapter = new MyCursorAdapter(this, TITLE_IDX, TEXT_IDX);
        lv.setAdapter(mAdapter);

        loadContent();
    }

    // would be better to do in a Loader, AsyncTask, ...
    private void loadContent() {
        ContentResolver cr = getContentResolver();
        Cursor c = cr.query(
                    MediaStore.Audio.Media.INTERNAL_CONTENT_URI,
                    PROJECTION, null, null, null
                );
        mAdapter.changeCursor(c);
    }
}

MyCursorAdapter.java
这个类中没有对Cursor的真正依赖，它与SimpleCursorAdapter

非常相似

public class MyCursorAdapter extends CursorAdapter {
    private final LayoutInflater mInflater;
    private final int mTitleIdx, mTextIdx;

    /**
     * Creates a new MyCursorAdapter. Set cursor via  changeCursor / swapCursor
     * @param context <code>this</code> will usually do
     * @param titleColumnIdx cursor columnindex to be displayed as title
     * @param textColumnIdx  cursor columnindex to be displayed as text below
     */
    public MyCursorAdapter(Context context, int titleColumnIdx, int textColumnIdx) {
        super(context, null, false);
        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        mTitleIdx = titleColumnIdx;
        mTextIdx = textColumnIdx;
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        TextView title = (TextView) view.findViewById(R.id.title);
        TextView text = (TextView) view.findViewById(R.id.text);
        title.setText(cursor.getString(mTitleIdx));
        text.setText(cursor.getString(mTextIdx));
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        View item = mInflater.inflate(R.layout.list_item, null);
        // could do static init here / attach holder / set onClickListeners, ...
        return item;
    }
}

main.xml中

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/list_view"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >
        <!-- Preview: listitem=@layout/list_item -->
    </ListView>

</LinearLayout>

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/title"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textAppearance="@android:style/TextAppearance.Large"
        android:textColor="@android:color/primary_text_dark"
        android:layout_marginTop="5dp" />

    <TextView
        android:id="@+id/text"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textAppearance="@android:style/TextAppearance.Small"
        android:textColor="@android:color/secondary_text_dark"
        android:singleLine="true"
        android:ellipsize="end"
        android:layout_marginBottom="5dp" />

</LinearLayout>

你得到什么

result

如何在ListActivity上以编程方式查找TextView

2 个答案: