實體類：

package com.example.showgetpic;

import android.R.integer;

class ImageBean {

public String path;

private int rightMargin;

private int bottomMargin;

public int getRightMargin() {

return rightMargin;

}

public void setRightMargin(int rightMargin) {

this.rightMargin = rightMargin;

}

public int getBottomMargin() {

return bottomMargin;

}

public void setBottomMargin(int bottomMargin) {

this.bottomMargin = bottomMargin;

}

public String getPath() {

return path;

}

public void setPath(String path) {

this.path = path;

}

}

BaseActivity:

/**

* Copyright (C) 2013-2014 EaseMob Technologies. All rights reserved.

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package com.example.showgetpic;

import android.os.Bundle;

import android.support.v4.app.FragmentActivity;

import android.view.View;

public class BaseActivity extends FragmentActivity {

@Override

protected void onCreate(Bundle arg0) {

super.onCreate(arg0);

}

@Override

protected void onResume() {

super.onResume();

// onresume時，取消notification顯示

// HXSDKHelper.getInstance().getNotifier().reset();

// umeng

// MobclickAgent.onResume(this);

}

@Override

protected void onStart() {

super.onStart();

// umeng

// MobclickAgent.onPause(this);

}

/**

* 返回

*

* @param view

*/

public void back(View view) {

finish();

}

}

package com.example.showgetpic;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.util.ArrayList;import android.R.integer;import android.content.Context;import android.content.Intent;import android.database.Cursor;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.provider.MediaStore;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.ImageView.ScaleType;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;import android.widget.Toast;/** * @author wangjing */public class MainActivity extends BaseActivity {private static final int SEL_PIC = 1;private Context context;private static int count =1;private LinearLayout linearLayout = null;private ArrayList imageBeans;private ImageView lv_image;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();}private void initView() {context = this;imageBeans = new ArrayList();linearLayout = (LinearLayout) findViewById(R.id.ly_list);findViewById(R.id.btn).setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// 本地相冊選取if (count>5) {Toast.makeText(context, "最多上傳5張", Toast.LENGTH_SHORT).show();return;}else {count++;Intent intent = new Intent(Intent.ACTION_GET_CONTENT); // "android.intent.action.GET_CONTENT"// intent.addCategory(Intent.CATEGORY_OPENABLE);intent.setType("image/*");startActivityForResult(intent, SEL_PIC);}}});}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (resultCode == RESULT_OK) {if (requestCode == SEL_PIC) {Uri uri = data.getData();String[] proj = { MediaStore.Images.Media.DATA };Cursor cursor = managedQuery(uri, proj, null, null, null);// 按我個人理解 這個是獲得用戶選擇的圖片的索引值int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);// 將光標移至開頭 ，這個很重要，不小心很容易引起越界cursor.moveToFirst();// 最后根據索引值獲取圖片路徑String path = cursor.getString(column_index);ImageBean bean = new ImageBean();bean.setPath(path);imageBeans.add(bean);updateLayout();}}}/** * 更新圖片布局 */private void updateLayout() {LinearLayout ll_horizontal = null;linearLayout.removeAllViews();for (int i = 0; i < imageBeans.size(); i++) {if (i % 4 == 0) {ll_horizontal = new LinearLayout(context);ll_horizontal.setOrientation(LinearLayout.HORIZONTAL);linearLayout.addView(ll_horizontal);}ImageView img =new ImageView(context);setImgLayoutParams(img);setImageBitmap(img, imageBeans.get(i).getPath());ll_horizontal.addView(img);}}/** * 設置imageview的尺寸 */private void setImgLayoutParams(ImageView img) {ViewGroup.LayoutParams lps =new android.view.ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);lps.width = (int) ((IApplication.getScreenWidth(context) - 20* IApplication.getScreenDensity(context) - 3 * 5 * IApplication.getScreenDensity(context)) / 4);lps.height = lps.width;img.setLayoutParams(lps);img.setScaleType(ScaleType.CENTER_CROP);}/** * 為imageview設置圖片 */private void setImageBitmap(ImageView img, String url) {try {FileInputStream fis = new FileInputStream(url);img.setImageBitmap(BitmapFactory.decodeStream(fis));} catch (FileNotFoundException e) {e.printStackTrace();}}}布局：

布局：

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="horizontal"

tools:context=".MainActivity" >

android:id="@+id/ly_list"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:orientation="vertical" >

android:id="@+id/btn"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/topic_plus_pressed" >

Application類：

package com.example.showgetpic;

import android.app.Application;

import android.content.Context;

import android.util.DisplayMetrics;

import android.view.WindowManager;

public class IApplication extends Application {

//獲取屏幕寬度

public static int getScreenWidth(Context context) {

WindowManager wm = (WindowManager) context

.getSystemService(Context.WINDOW_SERVICE);

DisplayMetrics outMetrics = new DisplayMetrics();

wm.getDefaultDisplay().getMetrics(outMetrics);

int width = outMetrics.widthPixels;

return width;

}

//獲取屏幕密度

public static float getScreenDensity(Context context) {

WindowManager wm = (WindowManager) context

.getSystemService(Context.WINDOW_SERVICE);

DisplayMetrics outMetrics = new DisplayMetrics();

wm.getDefaultDisplay().getMetrics(outMetrics);

float density = outMetrics.density;

return density;

}

/**

* 獲得屏幕高度

*/

public static int getScreenHeight(Context context) {

WindowManager wm = (WindowManager) context

.getSystemService(Context.WINDOW_SERVICE);

DisplayMetrics outMetrics = new DisplayMetrics();

wm.getDefaultDisplay().getMetrics(outMetrics);

int height = outMetrics.heightPixels;

return height;

}

/**

* 獲得狀態欄的高度

*/

public static int getStatusHeight(Context context) {

int statusHeight = -1;

try {

Class> clazz = Class.forName("com.android.internal.R$dimen");

Object object = clazz.newInstance();

int height = Integer.parseInt(clazz.getField("status_bar_height")

.get(object).toString());

statusHeight = context.getResources().getDimensionPixelSize(height);

} catch (Exception e) {

e.printStackTrace();

}

return statusHeight;

}

}