本文主要是介绍调取系统相册和照相机选取图片，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
在让用户自定义头像或皮肤的时候 可能会采取照相或选取相册等方法来实现用户自定义，这里我们就简单实现一下~
在这里先贴出布局-----仅供参考
activity_main://一张图片而已 很简单
<ImageView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/img_true" /> activity_select_photo://选择图片 其中有一些图片资源和动画，在文末分享给大家
<?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-----------
图片监听事件 点击跳转选择页面使用回调
<span style="white-space:pre"> </span>private ImageView imgtrue; /** 选择文件 */ public static final int TO_SELECT_PHOTO = 1; <span style="white-space:pre"> </span>//图片选择事件 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; } }); 回调方法 接收图片地址 设置给控件
@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);
} 将获取的图片按宽高进行缩放
/** * 将原图按照指定的宽高进行缩放 * * @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------------------
//图片选择
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 { /** 使用照相机拍照获取图片 */ public static final int SELECT_PIC_BY_TACK_PHOTO = 1; /** 使用相册中的图片 */ public static final int SELECT_PIC_BY_PICK_PHOTO = 2; /** 开启相机 */ private Button btn_take_photo; /** 开启图册 */ private Button btn_pick_photo; /** 取消 */ private Button btn_cancel; /** 获取到的图片路径 */ private String picPath; private Intent lastIntent; private Uri photoUri; /** 从Intent获取图片路径的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 : // 开启相机 takePhoto(); break; case R.id.btn_pick_photo : // 开启图册 pickPhoto(); break; case R.id.btn_cancel : // 取消操作 this.finish(); break; default : break; } } private void takePhoto() { // 执行拍照前，应该先判断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" /*** * 需要说明一下，以下操作使用照相机拍照，拍照后的图片会存放在相册中的 这里使用的这种方式有一个好处就是获取的图片是拍照后的原图 * 如果不实用ContentValues存放照片路径的话，拍照后获取的图片为缩略图不清晰 */ 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(), "内存卡不存在", Toast.LENGTH_SHORT).show(); } } /*** * 从相册中取图片 */ 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); } /** * 选择图片后，获取图片的路径 */ private void doPhoto(int requestCode, Intent data) { if (requestCode == SELECT_PIC_BY_PICK_PHOTO) {// 从相册取图片，有些手机有异常情况，请注意 if (data == null) { Toast.makeText(getApplicationContext(), "选择图片文件出错", Toast.LENGTH_SHORT).show(); return; } photoUri = data.getData(); if (photoUri == null) { Toast.makeText(getApplicationContext(), "选择图片文件出错", 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(), "选择图片文件不正确", Toast.LENGTH_SHORT).show(); } } } 资源分享：
动画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> 图片资源:
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