Android 如何在onActivityResult方法的自定义listView中添加项?
我正在使用android摄像头开发一个简单的视频应用程序。在我的应用程序中,我有一个名为“制作视频”的按钮和一个列表视图,用于显示我的应用程序录制的视频名称。现在,当我点击“制作视频”按钮时,它会打开我的移动摄像机进行录制,但当我完成录制时,摄像机会给我两个选项。“保存”和“丢弃”。现在,通过单击“保存”选项,我想将录制的视频的名称添加到我的列表视图中。我已经在这方面开发了一些代码,效果很好,但我面临的问题是如何在onActivityResult方法的listview中添加录制视频的名称并更新我的列表视图。请帮助我,我将非常感谢你 你可以在下面查看我的代码Android 如何在onActivityResult方法的自定义listView中添加项?,android,listview,Android,Listview,我正在使用android摄像头开发一个简单的视频应用程序。在我的应用程序中,我有一个名为“制作视频”的按钮和一个列表视图,用于显示我的应用程序录制的视频名称。现在,当我点击“制作视频”按钮时,它会打开我的移动摄像机进行录制,但当我完成录制时,摄像机会给我两个选项。“保存”和“丢弃”。现在,通过单击“保存”选项,我想将录制的视频的名称添加到我的列表视图中。我已经在这方面开发了一些代码,效果很好,但我面临的问题是如何在onActivityResult方法的listview中添加录制视频的名称并更新我
public class MainActivity extends ListActivity
{
private ArrayList<String> cameraVideoList = new ArrayList<String>();
Context ctx;
// Resources res;
int REQUEST_VIDEO_CAPTURED =1;
Uri uriVideo = null;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ctx = getApplicationContext();
Button makeVideo = (Button) findViewById(R.id.button1);
makeVideo.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
//Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
Intent intent = new Intent(android.provider.MediaStore.ACTION_VIDEO_CAPTURE);
startActivityForResult(intent, REQUEST_VIDEO_CAPTURED);
}
});
ListView videoList = getListView();
videoList.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,long arg3)
{
Toast.makeText(MainActivity.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
setListAdapter(new ImageAndTextAdapter(ctx, R.layout.list_item_icon_text, cameraVideoList));
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK)
{
if (requestCode == REQUEST_VIDEO_CAPTURED)
{
uriVideo = data.getData();
// Toast.makeText(MainActivity.this, uriVideo.getPath(),
// Toast.LENGTH_LONG).show();
//
// Toast.makeText(MainActivity.this, uriVideo.toString(),
// Toast.LENGTH_LONG).show();
cameraVideoList.add(getFileNameFromUrl(uriVideo.getPath().toString()));
}
}
}
public String getFileNameFromUrl(String path)
{
String[] pathArray = path.split("/");
return pathArray[pathArray.length - 1];
}
public class ImageAndTextAdapter extends ArrayAdapter<String>
{
private LayoutInflater mInflater;
private ArrayList<String> mStrings;
private int mViewResourceId;
public ImageAndTextAdapter(Context context, int textViewResourceId,ArrayList<String> objects)
{
super(context, textViewResourceId, objects);
mInflater = (LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mStrings = objects;
mViewResourceId = textViewResourceId;
}
public View getView(int position, View convertView, ViewGroup parent)
{
convertView = mInflater.inflate(mViewResourceId, null);
ImageView iv = (ImageView)convertView.findViewById(R.id.icon);
iv.setImageResource(R.drawable.video_icon);
TextView tv = (TextView)convertView.findViewById(R.id.text);
tv.setText(mStrings.get(position));
return convertView;
}
}
}
public类MainActivity扩展了ListActivity
{
private ArrayList CameravideList=新建ArrayList();
上下文ctx;
//资源和资源;
int-REQUEST\u-VIDEO\u-CAPTURED=1;
Uri uriVideo=null;
@凌驾
创建时受保护的void(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ctx=getApplicationContext();
按钮makeVideo=(按钮)findViewById(R.id.button1);
setOnClickListener(新的OnClickListener()
{
公共void onClick(视图v)
{
//Intent Intent=新Intent(android.provider.MediaStore.ACTION\u IMAGE\u CAPTURE);
意图=新意图(android.provider.MediaStore.ACTION\u VIDEO\u CAPTURE);
startActivityForResult(意图、请求、视频捕获);
}
});
ListView videoList=getListView();
videoList.setOnItemClickListener(新的OnItemClickListener()
{
@凌驾
public void onItemClick(适配器视图arg0、视图arg1、内部位置、长arg3)
{
Toast.makeText(MainActivity.this,“+”位置,Toast.LENGTH_SHORT.show();
}
});
setListAdapter(新的ImageAndTextAdapter(ctx,R.layout.list_item_icon_text,cameraVideoList));
}
@凌驾
受保护的void onActivityResult(int请求代码、int结果代码、意图数据)
{
//TODO自动生成的方法存根
super.onActivityResult(请求代码、结果代码、数据);
if(resultCode==RESULT\u OK)
{
if(requestCode==请求\u视频\u捕获)
{
uriVideo=data.getData();
//Toast.makeText(MainActivity.this,uriVideo.getPath(),
//Toast.LENGTH_LONG).show();
//
//Toast.makeText(MainActivity.this,uriVideo.toString(),
//Toast.LENGTH_LONG).show();
添加(getFileNameFromUrl(uriVideo.getPath().toString());
}
}
}
公共字符串getFileNameFromUrl(字符串路径)
{
String[]pathArray=path.split(“/”);
返回pathArray[pathArray.length-1];
}
公共类ImageAndTextAdapter扩展了ArrayAdapter
{
私人停车场;
私有数组列表mStrings;
私有int-mViewResourceId;
公共ImageAndTextAdapter(上下文上下文、int-textViewResourceId、ArrayList对象)
{
超级(上下文、textViewResourceId、对象);
mInflater=(LayoutInflater)ctx.getSystemService(Context.LAYOUT\u INFLATER\u SERVICE);
mStrings=对象;
mViewResourceId=textViewResourceId;
}
公共视图getView(int位置、视图转换视图、视图组父视图)
{
convertView=mInflater.inflate(mViewResourceId,null);
ImageView iv=(ImageView)convertView.findViewById(R.id.icon);
iv.setImageResource(R.drawable.video_图标);
TextView tv=(TextView)convertView.findViewById(R.id.text);
tv.setText(mStrings.get(position));
返回视图;
}
}
}
当您走上正确的道路时,这里需要进行一些更改
imageandtextapter适配器代码>作为全局和私有对象
onCreate(){
adapter = new ImageAndTextAdapter(ctx, R.layout.list_item_icon_text, cameraVideoList);
videoList.setAdapter(adapter);
}
现在在onActivityResult中,将新记录添加到列表对象后,只需调用适配器类的notifyDataSetChange()
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK)
{
if (requestCode == REQUEST_VIDEO_CAPTURED)
{
uriVideo = data.getData();
cameraVideoList.add(getFileNameFromUrl(uriVideo.getPath().toString()));
adapter.notifyDatasetChanged(); // here
}
}
}
你们走的路是对的,但这里需要一些改变
当您创建自定义适配器类对象时,该类对象不起作用,因为当您更改列表对象中的数据时,必须由适配器通知列表视图内容
声明imageandtextapter适配器代码>作为全局和私有对象
onCreate(){
adapter = new ImageAndTextAdapter(ctx, R.layout.list_item_icon_text, cameraVideoList);
videoList.setAdapter(adapter);
}
现在在onActivityResult中,将新记录添加到列表对象后,只需调用适配器类的notifyDataSetChange()
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK)
{
if (requestCode == REQUEST_VIDEO_CAPTURED)
{
uriVideo = data.getData();
cameraVideoList.add(getFileNameFromUrl(uriVideo.getPath().toString()));
adapter.notifyDatasetChanged(); // here
}
}
}
第一条路。
在这条线上。您创建了无法访问的ImageAndTextAdapter
对象
setListAdapter(new ImageAndTextAdapter(ctx, R.layout.list_item_icon_text, cameraVideoList));
提取变量中的imageandtextapter
对象
adapter = new ImageAndTextAdapter(ctx, R.layout.list_item_icon_text, cameraVideoList);
setListAdapter(adapter);
从onActivityResult()的语句调用ImageAndTextAdapter的notifyDataSetChanged()
if (requestCode == REQUEST_VIDEO_CAPTURED)
{
uriVideo = data.getData();
// Toast.makeText(MainActivity.this, uriVideo.getPath(),
// Toast.LENGTH_LONG).show();
//
// Toast.makeText(MainActivity.this, uriVideo.toString(),
// Toast.LENGTH_LONG).show();
cameraVideoList.add(getFileNameFromUrl(uriVideo.getPath().toString()));
adapter.notifyDataSetChanged();
}
第二种方式。您可以调用((ImageAndTextAdapter)getAdapter())。notifyDataSetChanged()
在您的onActivityResult()实现中,您可以这样做
if (requestCode == REQUEST_VIDEO_CAPTURED)
{
uriVideo = data.getData();
cameraVideoList.add(getFileNameFromUrl(uriVideo.getPath().toString()));
((ImageAndTextAdapter) getAdapter()).notifyDataSetChanged(); //
}
第一条路。
在这条线上。您创建了无法访问的ImageAndTextAdapter
对象
setListAdapter(new ImageAndTextAdapter(ctx, R.layout.list_item_icon_text, cameraVideoList));
提取变量中的imageandtextapter
对象
adapter = new ImageAndTextAdapter(ctx, R.layout.list_item_icon_text, cameraVideoList);
setListAdapter(adapter);
从onActivityResult()的语句调用ImageAndTextAdapter的notifyDataSetChanged()
if (requestCode == REQUEST_VIDEO_CAPTURED)
{
uriVideo = data.getData();
// Toast.makeText(MainActivity.this, uriVideo.getPath(),
// Toast.LENGTH_LONG).show();
//
// Toast.makeText(MainActivity.this, uriVideo.toString(),
// Toast.LENGTH_LONG).show();
cameraVideoList.add(getFileNameFromUrl(uriVideo.getPath().toString()));
adapter.notifyDataSetChanged();
}
第二种方式。您可以调用((ImageAndTextAdapter)getAdapter()).notifyDataSet等