由于工作要求最近在使用GridView完成图片的批量上传功能，我的例子当中包含仿微信图片上传、拍照、本地选择、相片裁剪等功能，如果有需要的朋友可以看一下，希望我的实际经验能对您有所帮助。
直接上图，下面的图片就是点击“加号”后弹出的对话框，通过对话框可以根据自己需求进行相片选择。
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
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() {
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);
}
}
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;
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;
}
}
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);
}
}
源码下载：http://xiazai.jb51.net/201707/yuanma/photoDemo.rar
总结
以上所述是小编给大家介绍的Android中使用GridView实现仿微信图片上传功能(附源代码)，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对考高分网网站的支持！
