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这篇文章将为大家详细讲解有关Android中怎么利用GridView实现微信图片上传功能，文章内容质量较高，因此小编分享给大家做个参考，希望大家阅读完这篇文章后对相关知识有一定的了解。
项目结构：
下面直接上代码。
整体的布局文件activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/index" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="44dp" android:background="#24cf5f" android:orientation="horizontal" > <ImageView android:id="@+id/back" android:layout_width="match_parent" android:layout_height="20dp" android:layout_gravity="center" android:layout_weight="5" android:src="@drawable/back" /> <TextView android:layout_width="fill_parent" android:layout_height="44dp" android:layout_weight="1" android:gravity="center" android:paddingRight="40dp" android:text="图片上传" android:textColor="#FFFFFF" android:textSize="30px" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="1dp" android:background="#000000" /> <ScrollView android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" > <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="1dp" android:background="#000000" /> <LinearLayout android:layout_width="match_parent" android:layout_height="60dp" android:layout_weight="1" android:orientation="vertical" > <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:text="请选择上传的图片" /> <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:text="（友情提示:图片最多可添加9张,点击可删除选择的图片）" android:textSize="18px" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="1dp" android:background="#000000" /> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" > <com.yihang.MyGridView.MyGridView android:id="@+id/gridView" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="5dp" android:layout_weight="111" android:columnWidth="90dp" android:gravity="center" android:horizontalSpacing="5dp" android:numColumns="4" android:stretchMode="columnWidth" android:verticalSpacing="5dp" /> </LinearLayout> </LinearLayout> </ScrollView> <Button android:id="@+id/bt_submit" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="bottom" android:layout_weight="5.2" android:background="#24cf5f" android:text="上传" android:textColor="#FFFFFF" android:textSize="16sp" /> </LinearLayout>
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<HashMap<String, Object>> 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<String, Object>>();
HashMap<String, Object> map = new HashMap<String, Object>();
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<String, Object> map = new HashMap<String, Object>();
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<String, Object> map = new HashMap<String, Object>();
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
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:gravity="bottom"> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" android:background="@drawable/btn_style_alert_dialog_background" android:padding="20dp"> <TextView android:id="@+id/btn_camera" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="18sp" android:background="@drawable/btn_style_alert_dialog_button" android:textColor="#0f0f0f" android:text="拍照" android:shadowDx="0.5" android:shadowDy="0.5" android:shadowRadius="0.5" android:shadowColor="#ffffff" android:layout_marginBottom="10dp" android:padding="10dp" android:gravity="center"/> <TextView android:id="@+id/btn_gallery" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="18sp" android:background="@drawable/btn_style_alert_dialog_button" android:textColor="#0f0f0f" android:text="从相册中选择" android:shadowDx="0.5" android:shadowDy="0.5" android:shadowRadius="0.5" android:shadowColor="#ffffff" android:layout_marginBottom="10dp" android:padding="10dp" android:gravity="center"/> <TextView android:id="@+id/btn_cancel" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@drawable/btn_style_alert_dialog_cancel" android:textColor="#ffffff" android:textSize="18sp" android:text="取消" android:shadowDx="0.5" android:shadowDy="0.5" android:shadowRadius="0.5" android:shadowColor="#000000" android:layout_marginTop="10dp" android:padding="10dp" android:gravity="center"/> </LinearLayout> </LinearLayout>
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);
}
}关于Android中怎么利用GridView实现微信图片上传功能就分享到这里了，希望以上内容可以对大家有一定的帮助，可以学到更多知识。如果觉得文章不错，可以把它分享出去让更多的人看到。
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