檢索Android圖片庫並顯示詳細資訊 @ 自由手記

package xiaosi.photoLibrary;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.database.Cursor;

import android.graphics.Bitmap;

import android.graphics.drawable.Drawable;

import android.os.Bundle;

import android.provider.MediaStore.Images.Media;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.TextView;

/**

* 該類完成圖片的檢索，顯示功能

*

* @author Administrator

*

*/

public class PhotoLibraryActivity extends Activity implements OnClickListener

{

private ImageView photo;

private Button next = null;

private Button previous = null;

private Button message = null;

private TextView position = null;

private Cursor cursor;

private int photoIndex;

private int photoNameIndex;

private int photoIDIndex;

private int photoTitleIndex;

private int photoSizeIndex;

private String Message = null;

private int totalNum = 0;

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

init();

}

private void init()

{

next = (Button) findViewById(R.id.next);

next.setOnClickListener(this);

previous = (Button) findViewById(R.id.previous);

previous.setOnClickListener(this);

message = (Button) findViewById(R.id.message);

message.setOnClickListener(this);

photo = (ImageView) this.findViewById(R.id.image_view);

position = (TextView) findViewById(R.id.number);

指定獲取的列

String columns[] = new String[] { Media.DATA, Media._ID, Media.TITLE, Media.DISPLAY_NAME, Media.SIZE };

得到一個游標

cursor = this.getContentResolver().query(Media.EXTERNAL_CONTENT_URI, columns, null, null, null);

獲取指定列的索引

photoIndex = cursor.getColumnIndexOrThrow(Media.DATA);

photoNameIndex = cursor.getColumnIndexOrThrow(Media.DISPLAY_NAME);

photoIDIndex = cursor.getColumnIndexOrThrow(Media._ID);

photoTitleIndex = cursor.getColumnIndexOrThrow(Media.TITLE);

photoSizeIndex = cursor.getColumnIndexOrThrow(Media.SIZE);

獲取圖片總數

totalNum = cursor.getCount();

跳到第一個圖片

if (cursor.moveToFirst())

{

setImage();

position.setText("(1/" + totalNum + ")");

}

}

@Override

public void onClick(View arg0)

{

switch (arg0.getId())

{

下一個

case R.id.next:

if (cursor.moveToNext())

{

setImage();

}

else

{

cursor.moveToLast();

}

break;

上一個

case R.id.previous:

if (cursor.moveToPrevious())

{

setImage();

}

else

{

cursor.moveToFirst();

}

break;

case R.id.message:

Dialog顯示詳細資訊

AlertDialog.Builder builder = new AlertDialog.Builder(PhotoLibraryActivity.this);

builder.setTitle("詳細資訊");

builder.setMessage(Message);

builder.setPositiveButton("關閉", new android.content.DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which)

{

dialog.dismiss();

}

});

builder.show();

break;

}

}

private void setImage()

{

獲取圖片的Name

String name = cursor.getString(photoNameIndex);

獲取圖片的ID

String number = cursor.getString(photoIDIndex);

獲取圖片的Title

String title = cursor.getString(photoTitleIndex);

獲取圖片的大小

String size = cursor.getString(photoSizeIndex);

獲取圖片存儲路徑

String path = cursor.getString(photoIndex);

為TextView:position賦值（現在所在的位置）

position.setText("(" + number + "/" + totalNum + ")");

Message = "Name:" + name + "\n" + "Number:" + number + "\n" + "Title:" + title + "\n" + "Size:" + size + "\n" + "Path:" + path;

通過路徑獲取圖片

Drawable image = Drawable.createFromPath(path);

photo.setImageDrawable(image);

}

}

mian.xml

[java]

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="HTTP://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:background="@drawable/background"

android:orientation="vertical" >

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="50dip"

android:orientation="horizontal" >

<Button

android:id="@+id/next"

android:layout_width="60dip"

android:layout_height="50dip"

android:background="@drawable/next"

android:paddingLeft="30dip" />

<TextView

android:id="@+id/number"

android:layout_width="100dip"

android:layout_height="50dip"

android:paddingLeft="30dip"

android:textColor="#000000"/>

<Button

android:id="@+id/previous"

android:layout_width="60dip"

android:layout_height="50dip"

android:background="@drawable/previous"

android:paddingLeft="30dip" />

<Button

android:id="@+id/message"

android:layout_width="80dip"

android:layout_height="40dip"

android:paddingLeft="30dip"

android:text="詳情"/>

</LinearLayout>

<ImageView

android:id="@+id/image_view"

android:layout_width="fill_parent"

android:layout_height="fill_parent" />

</LinearLayout>

來源:

http://blog.csdn.net/sjf0115/article/details/7365428

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