android权限 READ_DEVICE_CONFIG 与 WRITE_DEVICE_CONFIG

测试GTS的时候遇到GtsDeviceConfigTestCases failed
提示"android.permission.READ_DEVICE_CONFIG" 不能赋给未予置的应用
研究了下此权限 成果如下：

READ_DEVICE_CONFIG_PERMISSION

“android.permission.READ_DEVICE_CONFIG”

WRITE_DEVICE_CONFIG_PERMISSION

“android.permission.WRITE_DEVICE_CONFIG”

DeviceConfig API 使用

import android.provider.DeviceConfig;
import android.provider.DeviceConfig.OnPropertiesChangedListener;
import android.provider.DeviceConfig.Properties;

 DeviceConfig.setProperty(NAMESPACE1, KEY1, VALUE1, /*makeDefault=*/false);
 String result = DeviceConfig.getProperty(NAMESPACE1, KEY1);
final String result = DeviceConfig.getString(NAMESPACE1, KEY1, DEFAULT_VALUE);        
final boolean result = DeviceConfig.getBoolean(NAMESPACE1, KEY1, DEFAULT_BOOLEAN_TRUE);
final int result = DeviceConfig.getInt(NAMESPACE1, KEY1, DEFAULT_INT);
final float result = DeviceConfig.getFloat(NAMESPACE1, KEY1, DEFAULT_FLOAT);
final long result = DeviceConfig.getLong(NAMESPACE1, KEY1, DEFAULT_LONG);

//测试监听接口
private Properties setPropertiesAndAssertSuccessfulChange(String setNamespace, String setName,
            String setValue) {
        final List<PropertyUpdate> receivedUpdates = new ArrayList<>();
        OnPropertiesChangedListener changeListener = createOnPropertiesChangedListener(receivedUpdates);

        DeviceConfig.addOnPropertiesChangedListener(setNamespace, EXECUTOR, changeListener);

        DeviceConfig.setProperty(setNamespace, setName, setValue, /*makeDefault=*/false);
        waitForListenerUpdateOrTimeout(receivedUpdates, 1);
        DeviceConfig.removeOnPropertiesChangedListener(changeListener);

        assertEquals("Failed to receive update to OnPropertiesChangedListener",
                receivedUpdates.size(), 1);
        PropertyUpdate propertiesUpdate = receivedUpdates.get(0);
        propertiesUpdate.assertEqual(setNamespace, setName, setValue);

        return propertiesUpdate.properties;
    }
    
    private static class PropertyUpdate {
        String namespace;
        String name;
        String value;
        Properties properties;

        PropertyUpdate(String namespace, String name, String value) {
            this.name = name;
            this.namespace = namespace;
            this.value = value;
            this.properties = null;
        }

        PropertyUpdate(Properties properties) {
            if (properties.getKeyset().size() != 1) {
                fail("Unexpected properties size.");
            }
            this.namespace = properties.getNamespace();
            this.name = properties.getKeyset().iterator().next();
            this.value = properties.getString(this.name, null);
            this.properties = properties;
        }

        void assertEqual(String namespace, String name, String value) {
            assertEquals("Listener received update for unexpected namespace",
                    namespace, this.namespace);
            assertEquals("Listener received update for unexpected property",
                    this.name, name);
            assertEquals("Listener received update with unexpected value",
                    this.value, value);
        }

    }

总结

可使用此权限获取系统属性