android調取系統相冊和照相機選取圖片

在讓用戶自定義頭像或皮膚的時候  可能會採取照相或選取相冊等方法來實現用戶自定義，這裏我們就簡單實現一下~

在這裏先貼出佈局-----僅供參考

activity_main://一張圖片而已  很簡單

    <ImageView 
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@+id/img_true"
        />

activity_select_photo://選擇圖片   其中有一些圖片資源和動畫，在文末分享給大家

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center_horizontal" >

    <LinearLayout
        android:id="@+id/dialog_layout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginLeft="10dip"
        android:layout_marginRight="10dip"
        android:layout_marginBottom="10dp"
        android:gravity="center_horizontal"
        android:orientation="vertical" >

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/select_photo_up_bg"
            android:orientation="vertical"
            android:paddingBottom="5dp"
            android:paddingTop="5dp" >

            <Button
                android:id="@+id/btn_take_photo"
                android:layout_width="fill_parent"
                android:layout_height="35dp"
                android:background="@drawable/select_photo_bg"
                android:text="@string/paizhaoxuanqu"
                android:textStyle="bold" />

            <View
                android:layout_width="fill_parent"
                android:layout_height="0.5px"
                android:background="#828282" />

            <Button
                android:id="@+id/btn_pick_photo"
                android:layout_width="fill_parent"
                android:layout_height="35dp"
                android:layout_marginTop="0dip"
                android:background="@drawable/select_photo_bg"
                android:text="@string/xiangcexuanqu"
                android:textStyle="bold" />
        </LinearLayout>

        <Button
            android:id="@+id/btn_cancel"
            android:layout_width="fill_parent"
            android:layout_height="35dp"
            android:layout_marginTop="20dip"
            android:background="@drawable/select_photo_bg"
            android:paddingBottom="5dp"
            android:paddingTop="5dp"
            android:text="@string/exit"
            android:textColor="#ffff0000"
            android:textStyle="bold" />
    </LinearLayout>

</RelativeLayout>

-----------MainActivity-----------

圖片監聽事件   點擊跳轉選擇頁面使用回調

	/** 選擇文件 */
	public static final int TO_SELECT_PHOTO = 1;

         //圖片選擇事件
		imgtrue.setOnClickListener(new OnClickListener() {
			Intent intent;
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				intent = new Intent(this, SelectPhotoActivity.class);
				startActivityForResult(intent, TO_SELECT_PHOTO);
				intent = null;
			}
		});

回調方法 接收圖片地址  設置給控件

	@SuppressWarnings("deprecation")
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if (resultCode == Activity.RESULT_OK && requestCode == TO_SELECT_PHOTO) {
			picPath = data.getStringExtra(SelectPhotoActivity.KEY_PHOTO_PATH);
			Bitmap bm = BitmapFactory.decodeFile(picPath);
			zoomBitmap = zoomBitmap(bm, 300, 300);
			imgtrue.setBackgroundDrawable(new BitmapDrawable(bm));
		}
		super.onActivityResult(requestCode, resultCode, data);
	}

將獲取的圖片按寬高進行縮放

	/**
	 * 將原圖按照指定的寬高進行縮放
	 * 
	 * @param oldBitmap
	 * @param newWidth
	 * @param newHeight
	 * @return
	 */
	private Bitmap zoomBitmap(Bitmap oldBitmap, int newWidth, int newHeight) {
		int width = oldBitmap.getWidth();
		int height = oldBitmap.getHeight();
		float scaleWidth = ((float) newWidth) / width;
		float scaleHeight = ((float) newHeight) / height;
		Matrix matrix = new Matrix();
		matrix.postScale(scaleWidth, scaleHeight);
		Bitmap newBitmap = Bitmap.createBitmap(width, height, Config.RGB_565);
		Canvas canvas = new Canvas(newBitmap);
		canvas.drawBitmap(newBitmap, matrix, null);
		return newBitmap;
	}

------------------SelectPhotoActivity------------------

//圖片選擇

import android.app.Activity;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class SelectPhotoActivity extends Activity implements OnClickListener {
	/** 使用照相機拍照獲取圖片 */
	public static final int SELECT_PIC_BY_TACK_PHOTO = 1;
	/** 使用相冊中的圖片 */
	public static final int SELECT_PIC_BY_PICK_PHOTO = 2;
	/** 開啓相機 */
	private Button btn_take_photo;
	/** 開啓圖冊 */
	private Button btn_pick_photo;
	/** 取消 */
	private Button btn_cancel;
	/** 獲取到的圖片路徑 */
	private String picPath;
	private Intent lastIntent;
	private Uri photoUri;
	/** 從Intent獲取圖片路徑的KEY */
	public static final String KEY_PHOTO_PATH = "photo_path";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_select_photo);
		btn_take_photo = (Button) findViewById(R.id.btn_take_photo);
		btn_pick_photo = (Button) findViewById(R.id.btn_pick_photo);
		btn_cancel = (Button) findViewById(R.id.btn_cancel);

		lastIntent = getIntent();

		btn_take_photo.setOnClickListener(this);
		btn_pick_photo.setOnClickListener(this);
		btn_cancel.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
			case R.id.btn_take_photo : // 開啓相機
				takePhoto();
				break;
			case R.id.btn_pick_photo : // 開啓圖冊
				pickPhoto();
				break;
			case R.id.btn_cancel : // 取消操作
				this.finish();
				break;
			default :
				break;
		}
	}
	private void takePhoto() {
		//  執行拍照前，應該先判斷SD卡是否存在
		String SDState = Environment.getExternalStorageState();
		if (SDState.equals(Environment.MEDIA_MOUNTED)) {
			Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// "android.media.action.IMAGE_CAPTURE"
			/***
			 * 需要說明一下，以下操作使用照相機拍照，拍照後的圖片會存放在相冊中的 這裏使用的這種方式有一個好處就是獲取的圖片是拍照後的原圖
			 * 如果不實用ContentValues存放照片路徑的話，拍照後獲取的圖片爲縮略圖不清晰
			 */
			ContentValues values = new ContentValues();
			photoUri = this.getContentResolver().insert(
					MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
			intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, photoUri);
			startActivityForResult(intent, SELECT_PIC_BY_TACK_PHOTO);
		} else {
			Toast.makeText(getApplicationContext(), "內存卡不存在",
					Toast.LENGTH_SHORT).show();
		}
	}

	/***
	 *  從相冊中取圖片
	 */
	private void pickPhoto() {
		Intent intent = new Intent();
		intent.setType("image/*");
		intent.setAction(Intent.ACTION_GET_CONTENT);
		startActivityForResult(intent, SELECT_PIC_BY_PICK_PHOTO);
	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {
		finish();
		return super.onTouchEvent(event);
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if (resultCode == Activity.RESULT_OK) {
			doPhoto(requestCode, data);
		}
		super.onActivityResult(requestCode, resultCode, data);
	}

	/**
	 * 選擇圖片後，獲取圖片的路徑
	 */
	private void doPhoto(int requestCode, Intent data) {
		if (requestCode == SELECT_PIC_BY_PICK_PHOTO) {// 從相冊取圖片，有些手機有異常情況，請注意
			if (data == null) {
				Toast.makeText(getApplicationContext(), "選擇圖片文件出錯",
						Toast.LENGTH_SHORT).show();
				return;
			}
			photoUri = data.getData();
			if (photoUri == null) {
				Toast.makeText(getApplicationContext(), "選擇圖片文件出錯",
						Toast.LENGTH_SHORT).show();
				return;
			}
		}
		String[] pojo = {MediaStore.Images.Media.DATA};
		@SuppressWarnings("deprecation")
		Cursor cursor = managedQuery(photoUri, pojo, null, null, null);
		if (cursor != null) {
			int columnIndex = cursor.getColumnIndexOrThrow(pojo[0]);
			cursor.moveToFirst();
			picPath = cursor.getString(columnIndex);
			cursor.close();
		}
		if (picPath != null
				&& (picPath.endsWith(".png") || picPath.endsWith(".PNG")
						|| picPath.endsWith(".jpg") || picPath.endsWith(".JPG"))) {
			lastIntent.putExtra(KEY_PHOTO_PATH, picPath);
			setResult(Activity.RESULT_OK, lastIntent);
			finish();
		} else {
			Toast.makeText(getApplicationContext(), "選擇圖片文件不正確",
					Toast.LENGTH_SHORT).show();
		}
	}

}

其中會使用到intent的跳轉，我們可以在跳轉期間添加動畫以及背景透明:

<activity
            android:name="com.seven.activity.SelectPhotoActivity"
            android:screenOrientation="portrait"
            android:theme="@style/DialogStyleBottom" >
        </activity>

資源分享：

動畫anim
push_bottom_in.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- 上下滑入式 -->
<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <translate
        android:duration="200"
        android:fromYDelta="100%p"
        android:toYDelta="0" />

</set>

push_bottom_out.xml:

<?xml version="1.0" encoding="utf-8"?>
<!-- 上下滑出式 -->
<set xmlns:android="http://schemas.android.com/apk/res/android" >

    
    <translate
        android:duration="200"
        android:fromYDelta="0"
        android:toYDelta="50%p" />
</set>

strings.xml資源

<string name="paizhaoxuanqu">拍照選取</string>
<string name="xiangcexuanqu">相冊選取</string>
<string name="exit">取消</string>

stype.xml資源

 <!-- 選取照片的Activity的樣式風格，採取對話框的風格 -->
    <style name="AnimBottom" parent="@android:style/Animation">
        <item name="android:windowEnterAnimation">@anim/push_bottom_in</item>
        <item name="android:windowExitAnimation">@anim/push_bottom_out</item>
    </style>

    <style name="DialogStyleBottom" parent="android:Theme.Dialog">
        <item name="android:windowAnimationStyle">@style/AnimBottom</item>
        <item name="android:windowFrame">@null</item>
        <!-- 邊框 -->
        <item name="android:windowIsFloating">false</item>
        <!-- 是否浮現在activity之上 -->
        <item name="android:windowIsTranslucent">true</item>
        <!-- 半透明 -->
        <item name="android:windowNoTitle">true</item>
        <!-- 無標題 -->
        <item name="android:windowBackground">@android:color/transparent</item>
        <!-- 背景透明 -->
        <item name="android:backgroundDimEnabled">true</item>
        <!-- 模糊 -->
    </style>

圖片資源: