Android控制界面刷新技巧汇总

public class MemoryUtil {

  /**
   * 是否刷新第一个界面
   */
  public boolean isRefreshMain = false;

  /**
   * 是否刷新第二个界面
   */
  public boolean isRefreshSecond = false;

  /**
   * 是否刷新第三个界面
   */
  public boolean isRefreshThree = false;

  private static MemoryUtil mMS;
  public static MemoryUtil MS = MemoryUtil.getIntance();

  private static MemoryUtil getIntance() {
    if (mMS == null) mMS = new MemoryUtil();
    return mMS;
  }

  /**
   * 清理保存的内存
   */
  public static void clearMomery() {
    mMS = null;
  }
}

 private TextView tv_1;

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

    tv_1 = (TextView) findViewById(R.id.tv_1);

  }

  public void onClick(View view) {
    Intent intent = new Intent(this, SecondActivity.class);
    startActivity(intent);
  }

  @Override
  protected void onResume() {
    super.onResume();
    if (MemoryUtil.MS.isRefreshMain) {
      MemoryUtil.MS.isRefreshMain = false;
      Toast.makeText(this, "Main is Refresh", Toast.LENGTH_SHORT).show();
    }
  }

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

    findViewById(R.id.tv_2).setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        Intent intent = new Intent(SecondActivity.this, ThreeActivity.class);
        startActivity(intent);
      }
    });
  }

  public void onClick(View view) {
    MemoryUtil.MS.isRefreshMain = true;
  }

  @Override
  protected void onResume() {
    super.onResume();
    if (MemoryUtil.MS.isRefreshSecond) {
      MemoryUtil.MS.isRefreshSecond = false;
      Toast.makeText(this, "Second is Refresh", Toast.LENGTH_SHORT).show();
    }
  }

@Override
  protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_three);
    findViewById(R.id.tv_1).setOnClickListener(this);
    findViewById(R.id.tv_2).setOnClickListener(this);
  }

  @Override
  public void onClick(View v) {
    switch (v.getId()) {
      case R.id.tv_1:
        MemoryUtil.MS.isRefreshMain = true;
        break;
      case R.id.tv_2:
        MemoryUtil.MS.isRefreshSecond = true;
        break;
    }
  }