intent如何实现通信（每日一练之Intent发送数据）
intent如何实现通信（每日一练之Intent发送数据）| 字符串 | getString | putString || 布尔值 | getBoolean | putBoolean || 整数型 | getInt | putInt || 浮点数 | getFloat | putFloat || 双精度数 | getDouble | putDouble |
向下一个Activity发送数据
intent使用Bundle对象存放待传递的数据信息
| 数据类型 | 读方法 | 写方法 |
| ------------ | ------------ | ------------ |
| 整数型 | getInt | putInt |
| 浮点数 | getFloat | putFloat |
| 双精度数 | getDouble | putDouble |
| 布尔值 | getBoolean | putBoolean |
| 字符串 | getString | putString |
| 字符串数组 | getStringArray | getStringArray |
| 字符串列表 | getStringList | putStringList |
| 可序列化结构 | getSerializable | putSerializable |
发送页面
private TextView tv_send;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_intent_send);
tv_send = findViewById(R.id.tv_send);
Button btn_send = findViewById(R.id.btn_send);
btn_send.setOnClickListener(handler);
}
private View.OnClickListener handler = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_send:
//do something
Intent intent = new Intent();
intent.setClass(IntentSendActivity.this IntentReceiveMainActivity.class);
Bundle bundle = new Bundle();
bundle.putString("request_time" Utils.getNowTime());
bundle.putString("request_content" tv_send.getText().toString());
intent.putExtras(bundle);
startActivity(intent);
break;
}
}
};
接收页面
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_intent_receive_main);
tv_receive = findViewById(R.id.tv_receive);
Intent intent = new Intent();
Bundle bundle = getIntent().getExtras();
String request_time = bundle.getString("request_time");
String request_content = bundle.getString("request_content");
String desc = String.format(" 收到请求消息：\n请求事件为%s\n请求内容为%s" request_time request_content);
tv_receive.setText(desc);
Button btn_from_receive_to_send = findViewById(R.id.btn_from_receive_to_send);
btn_from_receive_to_send.setOnClickListener(clickFn);
}
```
