Android相機相冊的調用,圖片的存儲刪除

xml

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);
        // 新建圖片存儲的目錄
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)));
// 從資源文件中獲取圖片
photoorigin = BitmapFactory.decodeResource(getResources(),
R.drawable.origin);
// 初始化進度條
initSeek();
// 初始化按鈕
    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);
    // 設置進度條默認位置
    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);
}

// 重寫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)));
// 新建顏色矩陣
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 });
// 使用顏色矩陣過濾圖片
    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);
    // 初始化圖片
    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("是否刪除路徑" + Path + "下的所有文件" + "？")
            .setNegativeButton("確認",
                    new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            delete();
                            dialog.dismiss();
                            // 判斷是否完全刪除
                            File file = new File(Path);
                            File[] childFile = file.listFiles();
                            if (childFile.length == 0) {
                                Toast.makeText(MainActivity.this,
                                        "刪除成功", Toast.LENGTH_LONG)
                                        .show();
                            } else {
                                Toast.makeText(MainActivity.this,
                                        "刪除失敗", 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() {
    // 相冊
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() {
    // 自定義文件名
final String path = Path + "/" + getNowDateTime("yyyyMMddHHmmss")
        + ".jpg";
new AlertDialog.Builder(MainActivity.this)
        .setTitle("提示信息")
        .setMessage("是否將文件保存到" + Path + "？")
        .setNegativeButton("確認", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // 設置view可緩存.然後以bitmap獲取view的緩存
                iv_change.setDrawingCacheEnabled(true);
                Bitmap photofinally = iv_change.getDrawingCache();
                try {
                    BufferedOutputStream bos = new BufferedOutputStream(
                            new FileOutputStream(path));
                    // 將bitmap壓縮存儲,100表示不壓縮
                    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, "保存失敗",
                            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) {
            // 相冊uri獲取
        Uri uri = data.getData();
        // 共享相機獲取的數據
        ContentResolver cr = this.getContentResolver();
        try {
            // 回收bitmap
            if (photo != null && !photo.isRecycled()) {
                photo.recycle();
                System.gc();
            }
            // 將好;獲取的數據編碼成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為成功
    if (resultCode == -1) {
        ContentResolver cr = getContentResolver();
        Uri fileUri = Uri.fromFile(mCurrentPhotoFile);
        // 刷新單個文件
        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();
            }
            // 通過uri讀取資源
            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);
    }
}

剪裁圖片

    private void startPhotoZoom(Uri uri) {
        Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
// 設置裁剪
intent.putExtra("crop", "true");
// aspectX aspectY 是寬高的比例
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// outputX outputY 是裁剪圖片寬高
intent.putExtra("outputX", 320);
intent.putExtra("outputY", 320);
//返回數據
intent.putExtra("return-data", true);
    startActivityForResult(intent, REQUEST_CODE_HEAD);
}
//處理onActivityResult
private Bitmap saveImageView(String path, Intent data) throws Exception {
Bitmap photo = null;
//獲取綁定數據包
Bundle extras = data.getExtras();
if (extras != null) {
    //獲取綁定數據
    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;
}