點選頭像二次取樣
阿新 • • 發佈：2018-12-01
1.側滑佈局
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <ImageView android:id="@+id/image111" android:layout_width="100dp" android:layout_height="100dp" android:src="@mipmap/ic_launcher"/> <ListView android:id="@+id/menus" android:layout_width="match_parent" android:layout_height="match_parent"></ListView> </LinearLayout>
2.text
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/text" android:gravity="center" android:layout_width="200dp" android:layout_height="200dp" /> </LinearLayout>
3.Adapter
package com.bw.ymy.zonghe1.Adapter; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import com.bw.ymy.zonghe1.R; public class leftAdapter extends BaseAdapter { private Context context; //z左邊展示資料 private String[] menus=new String[] { "我的","電影","首頁" }; public leftAdapter(Context context) { this.context = context; } private final int ITEM_COUTN = 2; private final int IMAGE_TYPE = 0; private final int TEXT_TYPE = 1; @Override public int getCount() { return menus.length+1; } @Override public int getViewTypeCount() { return ITEM_COUTN; } @Override public int getItemViewType(int position) { return position==0?IMAGE_TYPE:TEXT_TYPE; } @Override public String getItem(int position) { if(position==0) { return null; } return menus[position-1]; } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder=null; if(convertView==null) { convertView=LayoutInflater.from(context).inflate(R.layout.lefttext,parent,false); holder=new ViewHolder(convertView); }else { holder = (ViewHolder) convertView.getTag(); } if(getItemViewType(position)==TEXT_TYPE) { holder.bind(getItem(position)); } return convertView; } //建立類 class ViewHolder{ TextView text; ImageView icon; public ViewHolder(View convertView) { icon=convertView.findViewById(R.id.icon); text=convertView.findViewById(R.id.text); } //賦值 public void bind(String item) { text.setText(item); } } }
4.Fragment
package com.bw.ymy.zonghe1.Fragment;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.content.CursorLoader;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.ListView;
import com.bw.ymy.zonghe1.Adapter.leftAdapter;
import com.bw.ymy.zonghe1.MainActivity;
import com.bw.ymy.zonghe1.R;
import com.bw.ymy.zonghe1.nutil.Bitmap;
public class leftfragment extends Fragment {
private ListView listview;
private leftAdapter adapter;
private ImageView image11;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.leftfragment,container,false);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//獲取資源id
listview=view.findViewById(R.id.menus);
image11=view.findViewById(R.id.image111);
listview.setAdapter(new leftAdapter(getActivity()));
image11.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent,100);
}
});
//點選跳轉
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
((MainActivity)getActivity()).shpwpage(position-1);
}
});
}
private String url2path(Uri uri)
{
String[] proj={MediaStore.Images.Media.DATA};
CursorLoader loader=new CursorLoader(getActivity(),uri,proj,null,null,null);
Cursor cursor=loader.loadInBackground();
int columnIndexOrThrow = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(columnIndexOrThrow);
}
private void progressimage(String s)
{
int size=getResources().getDimensionPixelSize(R.dimen.leftIconSize);
android.graphics.Bitmap bitmap = Bitmap.scaleBitmap(s, size, size);
image11.setImageBitmap(bitmap);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 100) {
Uri uri = data.getData();
progressimage(url2path(uri));
return;
}
super.onActivityResult(requestCode, resultCode, data);
}
}
5.二次取樣
package com.bw.ymy.zonghe1.nutil;
import android.graphics.BitmapFactory;
public class Bitmap {
public static android.graphics.Bitmap scaleBitmap(String imagepath, int width, int height)
{
BitmapFactory.Options options=new BitmapFactory.Options();
options.inJustDecodeBounds=true;
BitmapFactory.decodeFile(imagepath,options);
options.inSampleSize=Math.max(options.outWidth/width,options.outHeight/height);
options.inJustDecodeBounds=false;
return BitmapFactory.decodeFile(imagepath,options);
}
}
6.App
package com.bw.ymy.zonghe1.nutil;
import android.app.Application;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
public class App extends Application {
@Override
public void onCreate() {
super.onCreate();
ImageLoaderConfiguration configuration=null;
DisplayImageOptions options=new DisplayImageOptions.Builder().build();
configuration=new ImageLoaderConfiguration.Builder(this)
.diskCacheSize(50*1024*1024)
.build();
ImageLoader.getInstance().init(configuration);
}
}
