使用Lint检查改进代码

1、从命令行运行Lint（需要配置环境变量）

lint --help

2、通过gradle运行Lint

gradlew lint

3、配置lint

（1）配置lint.xml

<?xml version="1.0" encoding="UTF-8"?>
<lint>
    <!-- Disable the given check in this project -->
    <issue id="IconMissingDensityFolder" severity="ignore" />

    <!-- Ignore the ObsoleteLayoutParam issue in the specified files -->
    <issue id="ObsoleteLayoutParam">
        <ignore path="res/layout/activation.xml" />
        <ignore path="res/layout-xlarge/activation.xml" />
    </issue>

    <!-- Ignore the UselessLeaf issue in the specified file -->
    <issue id="UselessLeaf">
        <ignore path="res/layout/main.xml" />
    </issue>

    <!-- Change the severity of hardcoded strings to "error" -->
    <issue id="HardcodedText" severity="error" />
</lint>

（2）配置对java的检查

@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

（3）配置对xml的检查

您可以使用 tools:ignore 属性禁止 Lint 检查 XML 文件的特定部分。在 lint.xml 文件中添加以下命名空间值，以便 Lint 工具能识别此属性：

namespace xmlns:tools="http://schemas.android.com/tools"

tools:ignore="NewApi,StringFormatInvalid"

tools:ignore="all"

（4）通过gradle配置lint选项

android {
  ...
  lintOptions {
    // Turns off checks for the issue IDs you specify.
    disable 'TypographyFractions','TypographyQuotes'
    // Turns on checks for the issue IDs you specify. These checks are in
    // addition to the default lint checks.
    enable 'RtlHardcoded','RtlCompat', 'RtlEnabled'
    // To enable checks for only a subset of issue IDs and ignore all others,
    // list the issue IDs with the 'check' property instead. This property overrides
    // any issue IDs you enable or disable using the properties above.
    check 'NewApi', 'InlinedApi'
    // If set to true, turns off analysis progress reporting by lint.
    quiet true
    // if set to true (default), stops the build if errors are found.
    abortOnError false
    // if true, only report errors.
    ignoreWarnings true
  }
}
...

4、手动运行检查

您可以选择 Inspect Code > Analyze，手动运行已配置的 Lint 和其他 IDE 检查。检查结果显示在 Inspection Results 窗口中。