来源: 互联网  发布时间: 2014-02-18

回到home

Intent startMain = new Intent(Intent.ACTION_MAIN);
startMain.addCategory(Intent.CATEGORY_HOME);
startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(startMain);

    

    来源: 互联网  发布时间: 2014-02-18

intent调用总结（转）
显示Web网页:

  1. Uri uri = Uri.parse("http://www.android123.com.cn");
  2. Intent it = new Intent(Intent.ACTION_VIEW,uri);
  3. startActivity(it);

显示Google地图:

  1. Uri uri = Uri.parse("geo:38.899533,-77.036476");
  2. Intent it = new Intent(Intent.Action_VIEW,uri);
  3. startActivity(it);

Maps路径规划:

  1. Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=startLat%20startLng&daddr=endLat%20endLng&hl=en");
  2. Intent it = new Intent(Intent.ACTION_VIEW,URI);
  3. startActivity(it);

拨打电话:

  1. Uri uri = Uri.parse("tel:xxxxxx");
  2. Intent it = new Intent(Intent.ACTION_DIAL, uri);  
  3. startActivity(it); 

  1. Uri uri = Uri.parse("tel.xxxxxx");
  2. Intent it =new Intent(Intent.ACTION_CALL,uri);

注意需要权限 <uses-permission id="android.permission.CALL_PHONE" />

发送SMS/MMS

  1. Intent it = new Intent(Intent.ACTION_VIEW);
  2. it.putExtra("sms_body", "android开发网欢迎您");
  3. it.setType("vnd.android-dir/mms-sms");
  4. startActivity(it); 

发送短信

  1. Uri uri = Uri.parse("smsto:10086");
  2. Intent it = new Intent(Intent.ACTION_SENDTO, uri);
  3. it.putExtra("sms_body", "10086"); //正文为10086
  4. startActivity(it); 

发送彩信

  1. Uri uri = Uri.parse("content://media/external/images/media/10"); //该Uri根据实际情况修改，external代表外部存储即sdcard
  2. Intent it = new Intent(Intent.ACTION_SEND);
  3. it.putExtra("sms_body", "android123.com.cn");
  4. it.putExtra(Intent.EXTRA_STREAM, uri);
  5. it.setType("image/png");
  6. startActivity(it);

发送Email

  2. Uri uri = Uri.parse("mailto:android123@163.com");
  3. Intent it = new Intent(Intent.ACTION_SENDTO, uri);
  4. startActivity(it);

  1. Intent it = new Intent(Intent.ACTION_SEND);
  2. it.putExtra(Intent.EXTRA_EMAIL, "android123@163.com");
  3. it.putExtra(Intent.EXTRA_TEXT, "android开发网测试");
  4. it.setType("text/plain");
  5. startActivity(Intent.createChooser(it, "选择一个Email客户端")); 

  1. Intent it=new Intent(Intent.ACTION_SEND);  
  2. String[] tos={"android123@163.com"};     //发送到
  3. String[] ccs={"ophone123@163.com"};    //抄送
  4. it.putExtra(Intent.EXTRA_EMAIL, tos);  
  5. it.putExtra(Intent.EXTRA_CC, ccs);  
  6. it.putExtra(Intent.EXTRA_TEXT, "正文");  
  7. it.putExtra(Intent.EXTRA_SUBJECT, "标题");  
  8. it.setType("message/rfc822");    //编码类型
  9. startActivity(Intent.createChooser(it, "选择一个Email客户端"));

Email添加附件

  1. Intent it = new Intent(Intent.ACTION_SEND);
  2. it.putExtra(Intent.EXTRA_SUBJECT, "正文");
  3. it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/nobody.mp3"); //附件为sd卡上的nobody MP3文件
  4. sendIntent.setType("audio/mp3");
  5. startActivity(Intent.createChooser(it, "选择一个Email客户端"));

播放多媒体

  1.  
  2. Intent it = new Intent(Intent.ACTION_VIEW);
  3. Uri uri = Uri.parse("file:///sdcard/nobody.mp3");
  4. it.setDataAndType(uri, "audio/mp3");
  5. startActivity(it);

  1. Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1"); //从系统内部的MediaProvider索引中调用播放
  2. Intent it = new Intent(Intent.ACTION_VIEW, uri);
  3. startActivity(it); 

Uninstall卸载程序

  1. Uri uri = Uri.fromParts("package", packageName, null); //packageName为包名，比如com.android123.apkInstaller
  2. Intent it = new Intent(Intent.ACTION_DELETE, uri);
  3. startActivity(it);


进入联系人界面

Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(People.CONTENT_URI);
startActivity(intent);

查看某个联系人，当然这里是ACTION_VIEW，如果为选择并返回action改为ACTION_PICK，当然处理intent时返回需要用到startActivityforResult

Uri personUri = ContentUris.withAppendedId(People.CONTENT_URI, ID);//最后的ID参数为联系人Provider中的数据库BaseID，即哪一行
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(personUri);
startActivity(intent);

选择一个图片

Intent intent = new Intent(Intent.ACTION_GET_CONTENT); 
intent.addCategory(Intent.CATEGORY_OPENABLE); 
intent.setType("image/*");
startActivityForResult(intent, 0);

调用Android设备的照相机，并设置拍照后存放位置

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment
.getExternalStorageDirectory().getAbsolutePath()+"/cwj", android123 + ".jpg"))); //存放位置为sdcard卡上cwj文件夹，文件名为android123.jpg格式
startActivityForResult(intent, 0);

搜索指定package name在market上，比如搜索com.android123.cwj的写法如下

Uri uri = Uri.parse("market://search?q=pname:com.android123.cwj");  
Intent intent = new Intent(Intent.ACTION_VIEW, uri);  
startActivity(intent);   

    

    来源: 互联网  发布时间: 2014-02-18

比例缩放图片

// load the origial BitMap (500 x 500 px)
    Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(), 
           R.drawable.android);

    int width = bitmapOrg.width();
    int height = bitmapOrg.height();
    int newWidth = 200;
    int newHeight = 200;

    // calculate the scale - in this case = 0.4f
    float scaleWidth = ((float) newWidth) / width;
    float scaleHeight = ((float) newHeight) / height;

    // createa matrix for the manipulation
    Matrix matrix = new Matrix();
    // resize the bit map
    matrix.postScale(scaleWidth, scaleHeight);

    // recreate the new Bitmap
    Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0, 
                      width, height, matrix, true); 

    // make a Drawable from Bitmap to allow to set the BitMap 
    // to the ImageView, ImageButton or what ever
    BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);

    ImageView imageView = new ImageView(this);

    // set the Drawable on the ImageView
    imageView.setImageDrawable(bmd);

    // center the Image
    imageView.setScaleType(ScaleType.CENTER);