Question

listview.xml

<!--?xml version="1.0" encoding="utf-8"?-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">
    <ListView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:focusable="false"
        android:id="@+id/lstText">
    </ListView>
</LinearLayout>

ListView代码

package saint.animaltracking;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;

import java.util.List;

import saint.animaltracking.helper.AnimalAdapter;
import saint.animaltracking.helper.DatabaseHelper;

/**
 * Created by Kodie on 3/28/2016.
 */
public class selectAnimal extends AppCompatActivity
{
    private ListView lv;
    private List<animal> animal;
    private DatabaseHelper db;
    AnimalAdapter adapter;
    @Override
    protected void onCreate(final Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        db = new DatabaseHelper(this.getApplicationContext());
        setContentView(R.layout.main);
        animal = db.getAllAnimal();
        lv = (ListView) findViewById(R.id.lstText);

        adapter = new AnimalAdapter(this, R.layout.list_item, animal);

        lv.setAdapter(adapter);
        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                animal anim = (animal) lv.getItemAtPosition(position);
                Intent intent = new Intent(getApplicationContext(), specific.class);
                intent.putExtra("animal", anim);
                startActivity(intent);
            }
        });
    }
}

specific.class xml（我尝试调试问题时通用）

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

    <Button
        android:id="@+id/btnButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button 1"/>

    <Button
        android:id="@+id/btnButton2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button 2"
        android:layout_toRightOf="@+id/btnButton1"/>

    <Button
        android:id="@+id/btnButton3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button 3"
        android:layout_below="@+id/btnButton1"/>

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/btnButton3"
        android:layout_marginTop="94dp"
        android:text="User :"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignTop="@+id/textView1"
        android:layout_toRightOf="@+id/btnButton3" />

    <Button
        android:id="@+id/btnSubmit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/editText1"
        android:text="Submit" />

</RelativeLayout>

Specific.java代码

package saint.animaltracking;

import android.content.Intent;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;

/**
 * Created by Kodie on 5/2/2016.
 */
public class specific extends AppCompatActivity {
    String id;
    private SQLiteOpenHelper AT;

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.specific);
        Intent intent = getIntent();
    }
}

我遇到的问题是，当我点击特定的listview项目转到特定的动物时，它显示的只是一个空白页面。我不是很确定为什么，但我有一种强烈的感觉，它与我编写OnItemClickListener和OnItemClick的方式或它如何将意图传递给specific.java类有关？除了尝试重写OnItemClickListener部分之外，我已经完成了我能想到的所有事情（我已经在android中工作了大约三周）来解决这个问题。非常感谢任何正确方向的提示。提前谢谢。

更新：单击listitem时，我会反复收到以下消息

W / ViewRootImpl：由于没有窗口焦点而取消事件：MotionEvent ...

E / Surface：getSlotFromBufferLocked：未知缓冲区：0xb40d53a0

Answer 1

尝试在特定类中使用随机文本定义一些textview ..或类似Toast之类的东西，以证明特定类正在运行。

OnItemClick重定向到空白屏幕？

1 个答案: