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Android相机相册的调用,图片的存储删除

来源：程序员人生发布时间：2016-11-17 09:30:10 阅读次数：2425次

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

xml

<?xml version="1.0" encoding="utf⑻"?>
<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)));
// 从资源文件中获得图片
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);
    // 设置进度条默许位置
    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)));
// 新建色彩矩阵
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 });
// 使用色彩矩阵过滤图片
    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("是不是删除路径" + Path + "下的所有文件" + "？")
            .setNegativeButton("确认",
                    new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            delete();
                            dialog.dismiss();
                            // 判断是不是完全删除
                            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("是不是将文件保存到" + 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获得view的缓存
                iv_change.setDrawingCacheEnabled(true);
                Bitmap photofinally = iv_change.getDrawingCache();
                try {
                    BufferedOutputStream bos = new BufferedOutputStream(
                            new FileOutputStream(path));
                    // 将bitmap紧缩存储,100表示不紧缩
                    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获得
        Uri uri = data.getData();
        // 同享相机获得的数据
        ContentResolver cr = this.getContentResolver();
        try {
            // 回收bitmap
            if (photo != null && !photo.isRecycled()) {
                photo.recycle();
                System.gc();
            }
            // 将好;获得的数据编码成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=⑴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();
            }
            // 通过uri读取资源
            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);
    }
}

剪裁图片

    private void startPhotoZoom(Uri uri) {
        Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
// 设置裁剪
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", 320);
intent.putExtra("outputY", 320);
//返回数据
intent.putExtra("return-data", true);
    startActivityForResult(intent, REQUEST_CODE_HEAD);
}
//处理onActivityResult
private Bitmap saveImageView(String path, Intent data) throws Exception {
Bitmap photo = null;
//获得绑定数据包
Bundle extras = data.getExtras();
if (extras != null) {
    //获得绑定数据
    photo = extras.getParcelable("data");
        BufferedOutputStream bos = new BufferedOutputStream(
                new FileOutputStream(path));
        photo.compress(Bitmap.CompressFormat.JPEG, 60, bos);
        bos.flush();
        bos.close();
        bos = null;
    }
    return photo;
}

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