我知道有人问过它，但是相信我，我尝试了很多次向我的应用添加不同的代码，但是它总是让我出错，所以我想添加以下内容：
请注意，当我尝试添加以下代码时，它也给我带来了错误，我没有使用主要活动，而是列出了视图项活动
我的应用信息：buildToolsVersion“ 28.0.2”＆android.tools.build:gradle:3.2.0' ＆gradle包装器版本为gradle 4.6
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.codinginflow.videoviewexample.MainActivity">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<VideoView
android:id="@+id/video_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</FrameLayout>
</android.support.constraint.ConstraintLayout>
我的原始代码listviewsitem.java
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;
import com.xxx.xxx.config.admob;
import com.xxx.xxx.R;
import com.xxx.xxx.adapter.ListItemAdapter;
import com.xxx.xxx.database.DataBaseHelper;
import com.xxx.xxx.module.Item;
import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdSize;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.InterstitialAd;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.MediaController;
import android.widget.Toast;
import android.widget.VideoView;
public class ListViewsItems extends Activity {
InterstitialAd mInterstitialAd;
AdRequest adRequest;
private ListView lvItem;
private ListItemAdapter adapter;
private List<Item> mItemList;
private DataBaseHelper mDBHelper;
Button rateus, shareapp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_view);
VideoView videoView = (VideoView) findViewById(R.id.videoView);
videoView.setVideoPath("android.resource://" + getPackageName() + "/" + R.raw.video);
MediaController mediaController = new MediaController(this);
mediaController.setAnchorView(videoView);
videoView.setMediaController(mediaController);
videoView.start();
//View adContainer = findViewById(R.id.unitads);
final String packageName = this.getPackageName();
LinearLayout linearlayout = (LinearLayout)findViewById(R.id.unitads);
admob.admobBannerCall(this, linearlayout);
mInterstitialAd = new InterstitialAd(this);
mInterstitialAd.setAdUnitId(SettingsApp.Interstitial);
mInterstitialAd.setAdListener(new AdListener() {
@Override
public void onAdClosed() {
requestNewInterstitial();
}
});
requestNewInterstitial();
rateus = (Button)findViewById(R.id.rateus2);
shareapp= (Button) findViewById(R.id.play2);
rateus.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
AppRater.rateLink(ListViewsItems.this);
}
});
shareapp.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
ShareApp();
}
});
mDBHelper = new DataBaseHelper(this);
lvItem = (ListView)findViewById(R.id.listViewtest);
//Check exists database
File database = getApplicationContext().getDatabasePath(DataBaseHelper.DBNAME);
if(false == database.exists()) {
mDBHelper.getReadableDatabase();
//Copy db
if(copyDatabase(this)) {
//Toast.makeText(this, "Copy database succes", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Copy data error"+DataBaseHelper.DBLOCATION, Toast.LENGTH_LONG).show();
return;
}
}
//Get product list in db when db exists
mItemList = mDBHelper.getListItem();
//Init adapter
adapter = new ListItemAdapter(this, mItemList);
//Set adapter for listview
lvItem.setAdapter(adapter);
itemSelected();
}
private void ShareApp(){
Intent sharingIntent = new Intent(Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
String shareBody = "Hey my friend check out this app\n https://play.google.com/store/apps/details?id="+ getPackageName() +" \n";
sharingIntent.putExtra(Intent.EXTRA_SUBJECT, "Subject Here");
sharingIntent.putExtra(Intent.EXTRA_TEXT, shareBody);
startActivity(Intent.createChooser(sharingIntent, "Share via"));
}
private boolean copyDatabase(Context context) {
try {
InputStream inputStream = context.getAssets().open(DataBaseHelper.DBNAME);
String outFileName = DataBaseHelper.DBLOCATION + DataBaseHelper.DBNAME;
OutputStream outputStream = new FileOutputStream(outFileName);
byte[]buff = new byte[1024];
int length = 0;
while ((length = inputStream.read(buff)) > 0) {
outputStream.write(buff, 0, length);
}
outputStream.flush();
outputStream.close();
Log.w("MainActivity","DB copied");
return true;
}catch (Exception e) {
e.printStackTrace();
return false;
}
}
@Override
public void onBackPressed() {
AppRater.app_launched(this);
}
private void requestNewInterstitial() {
AdRequest adRequest = new AdRequest.Builder().build();
mInterstitialAd.loadAd(adRequest);
}
private void itemSelected() {
lvItem.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Item itemClicked = mItemList.get(position) ;
try {
//Class classe= Class.forName(getPackageName()+".Details");
Intent intent=new Intent(ListViewsItems.this,Details.class);
intent.putExtra("detail",""+itemClicked.getText());
intent.putExtra("title",""+itemClicked.getTitle());
startActivityForResult(intent, 1);
//startActivity(intent);
//finish();
if(admob.mCount == admob.nbShowInterstitial) {
if (mInterstitialAd.isLoaded())
mInterstitialAd.show();
admob.mCount=0;
}
++admob.mCount;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
};
});
}
}
和activity_list_view
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#f4f4f4"
tools:ignore="HardcodedText" >
<LinearLayout
android:id="@+id/liner_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:ignore="UselessParent"
android:paddingBottom="50dp">
<VideoView
android:id="@+id/videoView"
android:layout_width="wrap_content"
android:layout_height="360dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:id="@+id/rateus2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="50"
android:background="#241823"
android:drawableLeft="@drawable/ic_star"
android:drawablePadding="2dip"
android:lineSpacingExtra="10sp"
android:paddingLeft="30dip"
android:paddingRight="26dip"
android:singleLine="true"
android:text="@string/rate_us"
android:textColor="@color/menuTextcolor"
android:textSize="24sp"
tools:ignore="ButtonStyle" />
<Button
android:id="@+id/play2"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="50"
android:background="#260216"
android:drawableLeft="@drawable/ic_share"
android:drawablePadding="2dip"
android:paddingLeft="30dip"
android:paddingRight="26dip"
android:singleLine="true"
android:text="@string/share_it"
android:textColor="@color/menuTextcolor"
android:textSize="24sp"
tools:ignore="ButtonStyle" />
</LinearLayout>
<ListView
android:id="@+id/listViewtest"
android:layout_width="match_parent"
android:layout_height="80dp"
android:background="#f4f4f4"
android:divider="#f4f4f4"
android:dividerHeight="6dp"
android:paddingLeft="8dp"
android:paddingTop="8dp"
android:paddingRight="8dp"
tools:ignore="InefficientWeight"></ListView>
</LinearLayout>
<LinearLayout
android:id="@+id/unitads"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:gravity="center"
android:orientation="vertical" >
</LinearLayout>
</RelativeLayout>