Wolfx's Notebook

夜间模式

H5Plus/MUI FAQ ​

指定应用可运行的 Android 最低版本 ​

http://ask.dcloud.net.cn/article/193

获取本地图片的 BASE64 编码 ​

这里的 zoomImage() 是我自己写的压缩图片的方法，忽略就好

javascript
plus.gallery.pick(
  function (path) {
    var newPath = "_download/" + new Date().getTime() + ".jpg";
    var maxWidth = T.getMaxWidth();
    var bitmap = new plus.nativeObj.Bitmap("test");
    var wait = plus.nativeUI.showWaiting("正在压缩图片。..");
    zoomImage(path, newPath, maxWidth, function () {
      wait.close();
      var dst = plus.io.convertLocalFileSystemURL(newPath);
      bitmap.load(dst, function () {
        var base4 = bitmap.toBase64Data();
        console.log(base4.split(",")[1]);
        T._imgs.push(base4.split(",")[1]);
        T.$emit("upload_end", T._imgs.join(","));
      });
    });
  },
  function (e) {
    console.log("取消选择图片");
  },
  { filter: "image" }
);
plus.gallery.pick(
  function (path) {
    var newPath = "_download/" + new Date().getTime() + ".jpg";
    var maxWidth = T.getMaxWidth();
    var bitmap = new plus.nativeObj.Bitmap("test");
    var wait = plus.nativeUI.showWaiting("正在压缩图片。..");
    zoomImage(path, newPath, maxWidth, function () {
      wait.close();
      var dst = plus.io.convertLocalFileSystemURL(newPath);
      bitmap.load(dst, function () {
        var base4 = bitmap.toBase64Data();
        console.log(base4.split(",")[1]);
        T._imgs.push(base4.split(",")[1]);
        T.$emit("upload_end", T._imgs.join(","));
      });
    });
  },
  function (e) {
    console.log("取消选择图片");
  },
  { filter: "image" }
);

打包时地理定位之类的 key（如百度地图） ​

bash
BA:AD:09:3A:82:82:9F:B4:32:A7:B2:8C:B4:CC:F0:E9:F3:7D:AE:58
io.dcloud.H5...
BA:AD:09:3A:82:82:9F:B4:32:A7:B2:8C:B4:CC:F0:E9:F3:7D:AE:58
io.dcloud.H5...

应用升级 ​

javascript
function upgrade(url) {
  plus.nativeUI.showWaiting("升级中。..");
  var dtask = plus.downloader.createDownload(
    url,
    {
      method: "GET",
    },
    function (d, status) {
      if (status == 200) {
        console.log("下载升级包成功：" + d.filename);
        plus.runtime.install(
          d.filename,
          {},
          function () {
            plus.nativeUI.closeWaiting();
            plus.nativeUI.alert("更新成功，需要重新启动！", function () {
              plus.runtime.restart();
            });
          },
          function (e) {
            plus.nativeUI.closeWaiting();
            alert("更新失败：" + e.message);
          }
        );
      } else {
        plus.nativeUI.closeWaiting();
        alert("下载升级包失败：" + status);
      }
    }
  );
  //  dtask.addEventListener('statechanged', function(d, status) {
  //    console.log("statechanged: " + d.state);
  //  });
  dtask.start();
}
function upgrade(url) {
  plus.nativeUI.showWaiting("升级中。..");
  var dtask = plus.downloader.createDownload(
    url,
    {
      method: "GET",
    },
    function (d, status) {
      if (status == 200) {
        console.log("下载升级包成功：" + d.filename);
        plus.runtime.install(
          d.filename,
          {},
          function () {
            plus.nativeUI.closeWaiting();
            plus.nativeUI.alert("更新成功，需要重新启动！", function () {
              plus.runtime.restart();
            });
          },
          function (e) {
            plus.nativeUI.closeWaiting();
            alert("更新失败：" + e.message);
          }
        );
      } else {
        plus.nativeUI.closeWaiting();
        alert("下载升级包失败：" + status);
      }
    }
  );
  //  dtask.addEventListener('statechanged', function(d, status) {
  //    console.log("statechanged: " + d.state);
  //  });
  dtask.start();
}

图片压缩 ​

javascript
// 压缩图片
function compressImage(src, dst, quality, callback) {
  plus.zip.compressImage(
    {
      src: src,
      dst: dst,
      quality: quality,
    },
    function () {
      console.log("Compress success!");
      callback();
    },
    function (error) {
      console.log("Compress error!");
    }
  );
}
// 缩放图片
function zoomImage(src, dst, width, callback) {
  plus.zip.compressImage(
    {
      src: src,
      dst: dst,
      width: width,
    },
    function () {
      console.log("Compress success!");
      callback();
    },
    function (error) {
      console.log("Compress error!" + JSON.stringify(error));
    }
  );
}
// 压缩图片
function compressImage(src, dst, quality, callback) {
  plus.zip.compressImage(
    {
      src: src,
      dst: dst,
      quality: quality,
    },
    function () {
      console.log("Compress success!");
      callback();
    },
    function (error) {
      console.log("Compress error!");
    }
  );
}
// 缩放图片
function zoomImage(src, dst, width, callback) {
  plus.zip.compressImage(
    {
      src: src,
      dst: dst,
      width: width,
    },
    function () {
      console.log("Compress success!");
      callback();
    },
    function (error) {
      console.log("Compress error!" + JSON.stringify(error));
    }
  );
}

文件上传 ​

javascript
/**
 * 上传文件
 * @param {Object} url
 * @param {Object} filePath
 */
function upload(url, filePath) {
  var task = plus.uploader.createUpload(
    serverUrl + "/" + url,
    {
      method: "POST",
    },
    function (t, status) {
      // 上传完成
      if (status == 200) {
        alert("Upload success: " + t.url);
      } else {
        plus.nativeUI.toast("Upload failed: " + status);
      }
    }
  );
  task.addFile(filePath, {
    key: "testdoc",
  });
  //task.addData( "string_key", "string_value" );
  //task.addEventListener( "statechanged", onStateChanged, false );
  task.start();
}
/**
 * 上传文件
 * @param {Object} url
 * @param {Object} filePath
 */
function upload(url, filePath) {
  var task = plus.uploader.createUpload(
    serverUrl + "/" + url,
    {
      method: "POST",
    },
    function (t, status) {
      // 上传完成
      if (status == 200) {
        alert("Upload success: " + t.url);
      } else {
        plus.nativeUI.toast("Upload failed: " + status);
      }
    }
  );
  task.addFile(filePath, {
    key: "testdoc",
  });
  //task.addData( "string_key", "string_value" );
  //task.addEventListener( "statechanged", onStateChanged, false );
  task.start();
}

锁定屏幕方向 ​

javascript
// 竖屏
plus.screen.lockOrientation("portrait-primary");
// 竖屏
plus.screen.lockOrientation("portrait-primary");

获取图片的 BASE64 ​

javascript
function GetBase64Code(path) {
  //path 绝对路径
  var bitmap = new plus.nativeObj.Bitmap("test"); //test 标识谁便取
  // 从本地加载 Bitmap 图片
  bitmap.load(
    path,
    function () {
      var base4 = bitmap.toBase64Data();
      var datastr = base4.split(",", 3);
      if (datastr.length > 1) {
        pics.push(datastr[1]);
      } else {
        pics.push(datastr[0]);
      }
      console.log("加载图片：" + base4);
    },
    function (e) {
      console.log("加载图片失败：" + JSON.stringify(e));
    }
  );
}
function GetBase64Code(path) {
  //path 绝对路径
  var bitmap = new plus.nativeObj.Bitmap("test"); //test 标识谁便取
  // 从本地加载 Bitmap 图片
  bitmap.load(
    path,
    function () {
      var base4 = bitmap.toBase64Data();
      var datastr = base4.split(",", 3);
      if (datastr.length > 1) {
        pics.push(datastr[1]);
      } else {
        pics.push(datastr[0]);
      }
      console.log("加载图片：" + base4);
    },
    function (e) {
      console.log("加载图片失败：" + JSON.stringify(e));
    }
  );
}

利用 native.js 保持 app 后台运行 ​

如果不想程序后台被杀死，可以使用这个方法。

javascript
var g_wakelock = null;
// 允许程序后台运行，以持续获取 GPS 位置
function wakeLock() {
  //Android
  debugger;
  var main = plus.android.runtimeMainActivity();
  var Context = plus.android.importClass("android.content.Context");
  var PowerManager = plus.android.importClass("android.os.PowerManager");
  var pm = main.getSystemService(Context.POWER_SERVICE);
  g_wakelock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "ANY_NAME");
  g_wakelock.acquire();
}

// 结束程序后台运行
function releaseWakeLock() {
  if (g_wakelock != null && g_wakelock.isHeld()) {
    g_wakelock.release();
    g_wakelock = null;
  }
}
var g_wakelock = null;
// 允许程序后台运行，以持续获取 GPS 位置
function wakeLock() {
  //Android
  debugger;
  var main = plus.android.runtimeMainActivity();
  var Context = plus.android.importClass("android.content.Context");
  var PowerManager = plus.android.importClass("android.os.PowerManager");
  var pm = main.getSystemService(Context.POWER_SERVICE);
  g_wakelock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "ANY_NAME");
  g_wakelock.acquire();
}

// 结束程序后台运行
function releaseWakeLock() {
  if (g_wakelock != null && g_wakelock.isHeld()) {
    g_wakelock.release();
    g_wakelock = null;
  }
}

最后编辑时间:

Version 4.0 (framework-1.0.0-rc.20)

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