Android相机相册的调用,图片的存储删除

主要以SimpleFilter的源码为例子详解,app可在百度应用商店下载
SimpleFilter源代码下载

xml

<?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/iv_change"
        android:layout_width="fill_parent"
        android:scaleType="fitXY"
        android:layout_height="220dp"
        android:maxWidth="1000dp"
        android:maxHeight="1000dp"
        android:src="@drawable/origin"
/>
    <SeekBar 
        android:id="@+id/sb_alpha"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent"
        android:layout_margin="10dp"
        />
    <SeekBar 
        android:id="@+id/sb_red"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent"
        android:layout_margin="10dp"

        />
        <SeekBar 
        android:id="@+id/sb_green"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent"
        android:layout_margin="10dp"/>
    <SeekBar 
        android:id="@+id/sb_blue"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent"
        android:layout_margin="10dp"/>
    <TextView 
        android:id="@+id/tv_display"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="8dp"
        android:textSize="16sp"
        android:textColor="#333333"/>
    <LinearLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button 
            android:id="@+id/btn_photo"
            android:layout_height="40dp"
            android:layout_width="0dp"
            android:layout_marginLeft="4dp"
            android:text="拍 照"
            android:textColor="#fff"
            android:background="@xml/btn_blue"
            android:layout_weight="1"/>
        <Button 
            android:id="@+id/btn_picture"
            android:layout_height="40dp"
            android:layout_width="0dp"
            android:layout_marginLeft="4dp"
            android:layout_weight="1"
            android:textColor="#fff"
            android:layout_marginRight="4dp"
            android:background="@xml/btn_blue"
            android:text="相 册"/>
    </LinearLayout>
        <LinearLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:orientation="horizontal">
            <Button 
            android:id="@+id/btn_save"
            android:layout_height="40dp"
            android:layout_width="0dp"
            android:textColor="#fff"
            android:layout_marginLeft="4dp"
            android:layout_weight="1"
            android:background="@xml/btn_blue"
            android:text="保 存"/>
        <Button 
            android:id="@+id/btn_origin"
            android:layout_height="40dp"
            android:layout_width="0dp"
            android:textColor="#fff"
            android:layout_marginLeft="4dp"
            android:layout_marginRight="4dp"
            android:layout_weight="1"
            android:background="@xml/btn_blue"
            android:text="初始化"/>
        </LinearLayout>
         <LinearLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:orientation="horizontal">
        <Button 
            android:id="@+id/btn_delete"
            android:layout_height="40dp"
            android:layout_width="0dp"
            android:layout_marginLeft="4dp"
            android:text="清除保存文件"
            android:textColor="#fff"
            android:background="@xml/btn_blue"
            android:layout_weight="1"/>
        <Button 
            android:id="@+id/btn_see"
            android:layout_height="40dp"
            android:layout_width="0dp"
            android:layout_marginLeft="4dp"
            android:layout_weight="1"
            android:textColor="#fff"
            android:layout_marginRight="4dp"
            android:background="@xml/btn_blue"
            android:text="查看保存文件"/>
</LinearLayout>
</LinearLayout>

java

package com.example.mpaint;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnSeekBarChangeListener,
        OnClickListener {
    private ImageView iv_change;
    private SeekBar sb_alpha, sb_red, sb_green, sb_blue;
    private TextView tv_dispaly;
    private float a = 0f, r = 0f, g = 0f, b = 0f;
    private String Path;
    private Button btn_photo, btn_picture, btn_save, btn_origin,btn_delete,btn_see;
    private Bitmap photo = null,photoorigin;
    private File mCurrentPhotoFile;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        //新建图片存储的目录
        Path = Environment.getExternalStorageDirectory().toString()
                + "/mFilter";
        File file = new File(Path);
        if (!file.exists()) {
            file.mkdir();
        }
        iv_change = (ImageView) findViewById(R.id.iv_change);
        tv_dispaly = (TextView) findViewById(R.id.tv_display);
        tv_dispaly.setText("a: " + String.valueOf((a)) + "%     " + "r: "
                + String.valueOf((r)) + "     " + "g: " + String.valueOf((g))
                + "     " + "b: " + String.valueOf((b)));
        //从资源文件中获取图片
        photoorigin=BitmapFactory.decodeResource(getResources(), R.drawable.origin);
        //初始化进度条
        initSeek();
        //初始化按钮
        initButton();
    }

    private void initButton() {
        btn_save = (Button) findViewById(R.id.btn_save);
        btn_save.setOnClickListener(this);
        btn_photo = (Button) findViewById(R.id.btn_photo);
        btn_photo.setOnClickListener(this);
        btn_picture = (Button) findViewById(R.id.btn_picture);
        btn_picture.setOnClickListener(this);
        btn_origin = (Button) findViewById(R.id.btn_origin);
        btn_origin.setOnClickListener(this);
        btn_delete = (Button) findViewById(R.id.btn_delete);
        btn_delete.setOnClickListener(this);
        btn_see = (Button) findViewById(R.id.btn_see);
        btn_see.setOnClickListener(this);
    }

    private void initSeek() {
        sb_alpha = (SeekBar) findViewById(R.id.sb_alpha);
        sb_alpha.setOnSeekBarChangeListener(this);
        sb_red = (SeekBar) findViewById(R.id.sb_red);
        sb_red.setOnSeekBarChangeListener(this);
        //设置进度条默认位置
        sb_red.setProgress(50);
        sb_green = (SeekBar) findViewById(R.id.sb_green);
        sb_green.setOnSeekBarChangeListener(this);
        sb_green.setProgress(50);
        sb_blue = (SeekBar) findViewById(R.id.sb_blue);
        sb_blue.setOnSeekBarChangeListener(this);
        sb_blue.setProgress(50);
    }
//重写OnSeekBarChangeListener
    @Override
    public void onProgressChanged(SeekBar seekBar, int progress,
            boolean fromUser) {
        switch (seekBar.getId()) {
        case R.id.sb_alpha:
            a = (float) (progress / 100.0);
            break;
        case R.id.sb_red:
            r = (float) ((progress - 50) / 5.0);
            break;
        case R.id.sb_green:
            g = (float) ((progress - 50) / 5.0);
            break;
        case R.id.sb_blue:
            b = (float) ((progress - 50) / 5.0);
            break;

        default:
            break;
        }
        setArgb(1 - a, r + 1, g + 1, b + 1);
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {

    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {

    }

    public void setArgb(float alpha, float red, float green, float blue) {
        tv_dispaly.setText("a: " + String.valueOf((a * 100)) + "%     " + "r: "
                + String.valueOf((r)) + "     " + "g: " + String.valueOf((g))
                + "     " + "b: " + String.valueOf((b)));
        //新建颜色矩阵
        ColorMatrix mColorMatrix = new ColorMatrix(new float[] { red, 0, 0, 0,
                0, 0, green, 0, 0, 0, 0, 0, blue, 0, 0, 0, 0, 0, alpha, 0 });
        //使用颜色矩阵过滤图片
        iv_change.getDrawable().setColorFilter(
                new ColorMatrixColorFilter(mColorMatrix));
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.btn_origin:
            a = 0f;
            r = 0f;
            g = 0f;
            b = 0f;
            tv_dispaly.setText("a: " + String.valueOf((a)) + "%     " + "r: "
                    + String.valueOf((r)) + "     " + "g: " + String.valueOf((g))
                    + "     " + "b: " + String.valueOf((b)));
            sb_alpha.setProgress(0);
            sb_red.setProgress(50);
            sb_green.setProgress(50);
            sb_blue.setProgress(50);
            //初始化图片
            if(photo!=null) {
            iv_change.setBackgroundColor(Color.parseColor("#00000000"));
            iv_change.setImageBitmap(photo);}
            else{
                iv_change.setBackgroundColor(Color.parseColor("#00000000"));
                iv_change.setImageBitmap(photoorigin);
            }
            break;
        case R.id.btn_save:
            saveImageView();
            break;
        case R.id.btn_photo:
            takephoto();
            break;
        case R.id.btn_picture:
            takepicture();
            break;
        case R.id.btn_see:
            see();
            break;
        case R.id.btn_delete:
            new AlertDialog.Builder(MainActivity.this)
            .setTitle("提示信息")
            .setMessage("是否删除路径"+Path+"下的所有文件"+"？")
            .setNegativeButton("确认",new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    delete();
                    dialog.dismiss();
                    //判断是否完全删除
                    File file = new File(Path);
                    File[] childFile = file.listFiles();
                    if (childFile.length==0) {
                        Toast.makeText(MainActivity.this, "删除成功", Toast.LENGTH_LONG).show();
                    }else {
                        Toast.makeText(MainActivity.this, "删除失败", Toast.LENGTH_LONG).show();
                    }
                }
            })
            .setPositiveButton("取消",new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            }).show();
            break;

        default:
            break;
        }
    }
//查看文件
    private void see() {
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_GET_CONTENT);
        File file = new File(Path);
        intent.setDataAndType(Uri.fromFile(file),  "*/*");
        startActivityForResult(intent, 2);
    }

    private void delete() {
        File file = new File(Path);
        File[] childFile = file.listFiles();
        for (File file2 : childFile) {
            file2.delete();
        }
    }
    private void takepicture() {
    //相册
        Intent intentPick = new Intent(Intent.ACTION_PICK, null);
        intentPick.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                "image/*");
        startActivityForResult(intentPick, 0);
    }

    private void takephoto() {
    //照相
        mCurrentPhotoFile= new File(Path,
                "temp.jpg");
        Intent intent = new Intent(
                MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(mCurrentPhotoFile));
        startActivityForResult(intent, 1);
    }

    private void saveImageView() {
    //自定义文件名
        final String path = Path  +"/" +getNowDateTime("yyyyMMddHHmmss")
                + ".jpg";
        new AlertDialog.Builder(MainActivity.this)
        .setTitle("提示信息")
        .setMessage("是否将文件保存到"+Path+"？")
        .setNegativeButton("确认",new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                //设置view可缓存.然后以bitmap获取view的缓存
                iv_change.setDrawingCacheEnabled(true);
                Bitmap photofinally = iv_change.getDrawingCache();
                try {
                    BufferedOutputStream bos = new BufferedOutputStream(
                            new FileOutputStream(path));
                    //将bitmap压缩存储
                    photofinally.compress(Bitmap.CompressFormat.JPEG, 100, bos);
                    bos.flush();
                    bos.close();
                    bos = null;
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                iv_change.setDrawingCacheEnabled(false);
                File file = new File(path);
                dialog.dismiss();
                if (file.exists()) {
                    Toast.makeText(MainActivity.this, "保存成功", Toast.LENGTH_LONG).show();
                }else {
                    Toast.makeText(MainActivity.this, "保存失败", Toast.LENGTH_LONG).show();
                }
            }
        })
        .setPositiveButton("取消",new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        }).show();
    }

    public static String getNowDateTime(String format) {
        Date currentTime = new Date();
        SimpleDateFormat formatter = new SimpleDateFormat(format);// "yyyyMMdd"
        String dateString = formatter.format(currentTime);
        return dateString;
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
        case 0:
            if (data != null) {
            //相册uri获取
                Uri uri = data.getData();
                //共享相机获取的数据
                ContentResolver cr = this.getContentResolver();
                try {
                //回收bitmap
                    if (photo != null && !photo.isRecycled()) {
                        photo.recycle();
                        System.gc();
                    }
                    //将好;获取的数据编码成bitmap
                    photo = BitmapFactory.decodeStream(cr.openInputStream(uri));
                } catch (Exception e) {
                    e.printStackTrace();
                }
                iv_change.setBackgroundColor(Color.parseColor("#00000000"));
                iv_change.setImageBitmap(photo);
            }
            break;
        case 1:
        //resultCode=-1为成功
            if (resultCode==-1) {
            ContentResolver cr = getContentResolver();
            Uri fileUri = Uri.fromFile(mCurrentPhotoFile);
            //刷新单个文件
            sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,fileUri));
            //刷新sd卡
            //sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, dirUri));
                try {
                    if (photo != null && !photo.isRecycled()) {
                        photo.recycle();
                        System.gc();
                    }
                    photo = BitmapFactory.decodeStream(cr.openInputStream(fileUri));
                } catch (Exception e) {
                    e.printStackTrace();
                }

                iv_change.setBackgroundColor(Color.parseColor("#00000000"));
                iv_change.setImageBitmap(photo);
            }
            break;
        case 2:
            break;
        default:
            break;
        }

        super.onActivityResult(requestCode, resultCode, data);
    }
}