Android如何让APP无法在指定的系统版本上运行(实现方法)

public class TargetSdkVersionDemo extends Activity {
  @Override
  protected void onCreate(Bundle onSavedInstance) {
    super.onCreate(onSavedInstance);
    setContentView(R.layout.target_sdk_version_demo);

    int appTargetSdkVersion = getApplicationInfo().targetSdkVersion;
    Log.i("TargetSdkVersionDemo", "targetsdkversion " + appTargetSdkVersion);
    
    // 我们假设这个APP的目标运行版本不高于 API Level 26
    if (appTargetSdkVersion <= Build.VERSION_CODES.O) {
      showNotSupportDialog(appTargetSdkVersion);
    }
  }

  private void showNotSupportDialog(int version) {
    new AlertDialog.Builder(this)
        .setMessage("该APP的目标运行版本是 " + version + "，低于手机当前的版本，不支持运行！")
        .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialog, int which) {

            // 退出程序
            finish();
          }
        })
        .create()
        .show();

  }
}

<uses-sdk android:targetSdkVersion="25" />

pkg.applicationInfo.targetSdkVersion = targetSdkVersion