自动调节亮度动态申请权限代码用例
时间: 2023-09-12 11:06:59 浏览: 89
实现光源亮度调控代码
以下是Android中自动调节亮度动态申请权限的代码用例:
1. 在AndroidManifest.xml文件中添加权限:
```xml
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
```
2. 在Activity中动态申请权限:
```java
private static final int REQUEST_WRITE_SETTINGS = 1;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (!Settings.System.canWrite(this)) {
Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
intent.setData(Uri.parse("package:" + getPackageName()));
startActivityForResult(intent, REQUEST_WRITE_SETTINGS);
}
}
```
3. 处理权限请求结果:
```java
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_WRITE_SETTINGS) {
if (Settings.System.canWrite(this)) {
// 权限已经被授予
// 在此处调节屏幕亮度
} else {
// 用户拒绝了权限请求
// 在此处处理拒绝权限的情况
}
}
}
```
4. 调节屏幕亮度:
```java
private void setBrightness(int brightness) {
try {
ContentResolver resolver = getContentResolver();
Settings.System.putInt(resolver, Settings.System.SCREEN_BRIGHTNESS_MODE, Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
Settings.System.putInt(resolver, Settings.System.SCREEN_BRIGHTNESS, brightness);
} catch (Exception e) {
e.printStackTrace();
}
}
```
注意:在调节亮度时,必须先将屏幕亮度模式设置为手动模式(SCREEN_BRIGHTNESS_MODE_MANUAL),然后再设置屏幕亮度。
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