?直接看代碼吧，很簡單

public class MainActivity extends AppCompatActivity {private TextView code;private Handler handler;int codeLen = 61;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);code = findViewById(R.id.rx_txt);handler = new Handler();code.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {handler.postDelayed(new Runnable() {@Overridepublic void run() {if (codeLen > 0) {codeLen--;code.setClickable(false);code.setText(codeLen + "s");handler.postDelayed(this, 1000);} else if (codeLen == 0) {code.setText("重新獲取");code.setClickable(true);handler.removeCallbacks(this);codeLen = 61;}}}, 1000);}});}@Overrideprotected void onDestroy() {super.onDestroy();if (handler !=null){handler.removeCallbacksAndMessages(null);handler = null;}}
}

?

同樣也可以換一種寫法，如下

public class MainActivity extends AppCompatActivity {private TextView code;private Handler handler;int codeLen = 61;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);code = findViewById(R.id.rx_txt);handler = new Handler();code.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {handler.postDelayed(time, 1000);}});}Runnable time = new Runnable() {@Overridepublic void run() {if (codeLen > 0) {codeLen--;code.setClickable(false);code.setText(codeLen + "s");handler.postDelayed(this, 1000);} else if (codeLen == 0) {code.setText("重新獲取");code.setClickable(true);handler.removeCallbacks(this);codeLen = 61;}}};@Overrideprotected void onDestroy() {super.onDestroy();if (handler != null) {handler.removeCallbacksAndMessages(null);handler = null;}if (time != null) {time = null;}}
}

?

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