ScreenOrientation.java

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The file containing the source code shown below is located in the corresponding directory in <sdk>/samples/android-<version>/...

/*
 * Copyright (C) 2010 The Android开源工程
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.app;

import com.example.android.apis.R;

import android.app.Activity;
import android.app.admin.DevicePolicyManager;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.AdapterView.OnItemSelectedListener;

public class ScreenOrientation extends Activity {
    Spinner mOrientation;

    // Orientation spinner choices
    // This list must match the list found in samples/ApiDemos/res/values/arrays.xml
    final static int mOrientationValues[] = new int[] {
        ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED,
        ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE,
        ActivityInfo.SCREEN_ORIENTATION_PORTRAIT,
        ActivityInfo.SCREEN_ORIENTATION_USER,
        ActivityInfo.SCREEN_ORIENTATION_BEHIND,
        ActivityInfo.SCREEN_ORIENTATION_SENSOR,
        ActivityInfo.SCREEN_ORIENTATION_NOSENSOR,
        ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE,
        ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT,
        ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE,
        ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT,
        ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR,
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.screen_orientation);

        mOrientation = (Spinner)findViewById(R.id.orientation);
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                this, R.array.screen_orientations, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        mOrientation.setAdapter(adapter);
        mOrientation.setOnItemSelectedListener(
                new OnItemSelectedListener() {
                    public void onItemSelected(
                            AdapterView<?> parent, View view, int position, long id) {
                        setRequestedOrientation(mOrientationValues[position]);
                    }

                    public void onNothingSelected(AdapterView<?> parent) {
                        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
                    }
                });
    }
}