Android中怎么利用GridView实现微信图片上传功能
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项目结构:
下面直接上代码。
整体的布局文件activity_main.xml
activity:MainActivity
package com.yihang.activity; import java.io.ByteArrayOutputStream; import java.io.File; import java.util.ArrayList; import java.util.HashMap; import android.app.Activity; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.ActivityInfo; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.GridView; import android.widget.ImageView; import android.widget.SimpleAdapter; import android.widget.SimpleAdapter.ViewBinder; import android.widget.Toast; import com.yihang.dialog.MyDialog; import com.yihang.dialog.MyDialog.OnButtonClickListener; import com.yihang.photodemo.R; public class MainActivity extends Activity implements OnButtonClickListener, OnItemClickListener{ private MyDialog dialog;// 图片选择对话框 public static final int NONE = 0; public static final int PHOTOHRAPH = 1;// 拍照 public static final int PHOTOZOOM = 2; // 缩放 public static final int PHOTORESOULT = 3;// 结果 public static final String IMAGE_UNSPECIFIED = "image/*"; private GridView gridView; // 网格显示缩略图 private final int IMAGE_OPEN = 4; // 打开图片标记 private String pathImage; // 选择图片路径 private Bitmap bmp; // 导入临时图片 private ArrayList> imageItem; private SimpleAdapter simpleAdapter; // 适配器 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); /* * 防止键盘挡住输入框 不希望遮挡设置activity属性 android:windowSoftInputMode="adjustPan" * 希望动态调整高度 android:windowSoftInputMode="adjustResize" */ getWindow().setSoftInputMode( WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN); // 锁定屏幕 setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); setContentView(R.layout.activity_main); init(); initData(); } private void init() { gridView = (GridView) findViewById(R.id.gridView); gridView.setOnItemClickListener(this); dialog = new MyDialog(this); dialog.setOnButtonClickListener(this); // activity中调用其他activity中组件的方法 LayoutInflater layout = this.getLayoutInflater(); View view = layout.inflate(R.layout.layout_select_photo, null); } private void initData() { /* * 载入默认图片添加图片加号 */ bmp = BitmapFactory.decodeResource(getResources(), R.drawable.gridview_addpic); // 加号 imageItem = new ArrayList >(); HashMap map = new HashMap (); map.put("itemImage", bmp); imageItem.add(map); simpleAdapter = new SimpleAdapter(this, imageItem, R.layout.griditem_addpic, new String[] { "itemImage" }, new int[] { R.id.imageView1 }); simpleAdapter.setViewBinder(new ViewBinder() { @Override public boolean setViewValue(View view, Object data, String textRepresentation) { // TODO Auto-generated method stub if (view instanceof ImageView && data instanceof Bitmap) { ImageView i = (ImageView) view; i.setImageBitmap((Bitmap) data); return true; } return false; } }); gridView.setAdapter(simpleAdapter); } @Override public void camera() { // TODO Auto-generated method stub Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File( Environment.getExternalStorageDirectory(), "temp.jpg"))); startActivityForResult(intent, PHOTOHRAPH); } @Override public void gallery() { // TODO Auto-generated method stub Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); startActivityForResult(intent, IMAGE_OPEN); } @Override public void cancel() { // TODO Auto-generated method stub dialog.cancel(); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { // TODO Auto-generated method stub super.onActivityResult(requestCode, resultCode, data); if (resultCode == NONE) return; // 拍照 if (requestCode == PHOTOHRAPH) { // 设置文件保存路径这里放在跟目录下 File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg"); startPhotoZoom(Uri.fromFile(picture)); } if (data == null) return; // 处理结果 if (requestCode == PHOTORESOULT) { Bundle extras = data.getExtras(); if (extras != null) { Bitmap photo = extras.getParcelable("data"); ByteArrayOutputStream stream = new ByteArrayOutputStream(); photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);// (0-100)压缩文件 // 将图片放入gridview中 HashMap map = new HashMap (); map.put("itemImage", photo); imageItem.add(map); simpleAdapter = new SimpleAdapter(this, imageItem, R.layout.griditem_addpic, new String[] { "itemImage" }, new int[] { R.id.imageView1 }); simpleAdapter.setViewBinder(new ViewBinder() { @Override public boolean setViewValue(View view, Object data, String textRepresentation) { // TODO Auto-generated method stub if (view instanceof ImageView && data instanceof Bitmap) { ImageView i = (ImageView) view; i.setImageBitmap((Bitmap) data); return true; } return false; } }); gridView.setAdapter(simpleAdapter); simpleAdapter.notifyDataSetChanged(); dialog.dismiss(); } } // 打开图片 if (resultCode == RESULT_OK && requestCode == IMAGE_OPEN) { startPhotoZoom(data.getData()); } super.onActivityResult(requestCode, resultCode, data); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); if (!TextUtils.isEmpty(pathImage)) { Bitmap addbmp = BitmapFactory.decodeFile(pathImage); HashMap map = new HashMap (); map.put("itemImage", addbmp); imageItem.add(map); simpleAdapter = new SimpleAdapter(this, imageItem, R.layout.griditem_addpic, new String[] { "itemImage" }, new int[] { R.id.imageView1 }); simpleAdapter.setViewBinder(new ViewBinder() { @Override public boolean setViewValue(View view, Object data, String textRepresentation) { // TODO Auto-generated method stub if (view instanceof ImageView && data instanceof Bitmap) { ImageView i = (ImageView) view; i.setImageBitmap((Bitmap) data); return true; } return false; } }); gridView.setAdapter(simpleAdapter); simpleAdapter.notifyDataSetChanged(); // 刷新后释放防止手机休眠后自动添加 pathImage = null; dialog.dismiss(); } } @Override public void onItemClick(AdapterView> parent, View v, int position, long id) { // TODO Auto-generated method stub if (imageItem.size() == 10) { // 第一张为默认图片 Toast.makeText(MainActivity.this, "图片数9张已满", Toast.LENGTH_SHORT).show(); } else if (position == 0) { // 点击图片位置为+ 0对应0张图片 // 选择图片 dialog.show(); // 通过onResume()刷新数据 } else { dialog(position); } } /* * Dialog对话框提示用户删除操作 position为删除图片位置 */ protected void dialog(final int position) { AlertDialog.Builder builder = new Builder(MainActivity.this); builder.setMessage("确认移除已添加图片吗?"); builder.setTitle("提示"); builder.setPositiveButton("确认", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); imageItem.remove(position); simpleAdapter.notifyDataSetChanged(); } }); builder.setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); builder.create().show(); } public void startPhotoZoom(Uri uri) { Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, IMAGE_UNSPECIFIED); intent.putExtra("crop", "true"); // aspectX aspectY 是宽高的比例 intent.putExtra("aspectX", 1); intent.putExtra("aspectY", 1); // outputX outputY 是裁剪图片宽高 intent.putExtra("outputX", 64); intent.putExtra("outputY", 64); intent.putExtra("return-data", true); startActivityForResult(intent, PHOTORESOULT); } }
弹出的对话框(仿照微信来完成):MyDialog
package com.yihang.dialog; import com.yihang.photodemo.R; import android.app.Dialog; import android.content.Context; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.view.View.OnClickListener; /** * 对话框实现类 * @author admin * */ public class MyDialog extends Dialog implements OnClickListener { public MyDialog(Context context) { super(context,R.style.myDialog); //初始化布局 setContentView(R.layout.layout_select_photo); Window dialogWindow = getWindow(); dialogWindow.setLayout(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); dialogWindow.setGravity(Gravity.BOTTOM); setCanceledOnTouchOutside(true); findViewById(R.id.btn_camera).setOnClickListener(this); findViewById(R.id.btn_gallery).setOnClickListener(this); findViewById(R.id.btn_cancel).setOnClickListener(this); } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.btn_camera: onButtonClickListener.camera(); break; case R.id.btn_gallery: onButtonClickListener.gallery(); break; case R.id.btn_cancel: onButtonClickListener.cancel(); break; default: break; } } /** * 按钮的监听器 * @author Orathee * @date 2014年3月20日 下午4:28:39 */ public interface OnButtonClickListener{ void camera(); void gallery(); void cancel(); } private OnButtonClickListener onButtonClickListener; public OnButtonClickListener getOnButtonClickListener() { return onButtonClickListener; } public void setOnButtonClickListener(OnButtonClickListener onButtonClickListener) { this.onButtonClickListener = onButtonClickListener; } }
对话框的布局文件:layout_select_photo.xml
自定义的GridView:
package com.yihang.MyGridView; import android.content.Context; import android.util.AttributeSet; import android.widget.GridView; public class MyGridView extends GridView { public MyGridView(Context context, AttributeSet attrs) { super(context, attrs); // TODO Auto-generated constructor stub } public MyGridView(Context context) { super(context); } public MyGridView(Context context, AttributeSet attrs, int defStyle) { super(context); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { // TODO Auto-generated method stub int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST); super.onMeasure(widthMeasureSpec, expandSpec); } }
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