android nfc singleTop模式下保存数据

1
onNewIntent()这个方法来触发时间。经过试验nfc再感应到卡片式生命周期的触发模式为

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
import android.content.Context;
import android.content.Intent;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.nfc.tech.Ndef;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

import com.ricky.nfc.R;
import com.ricky.nfc.base.BaseNfcActivity;

import java.nio.charset.Charset;
import java.util.Locale;


public class WriteTextActivity extends Activity {
    private String mText = "NFC-NewText-123";

    private static final String TAG = "LifeCycleActivity";
    private Context context = this;
    private int param = 1;
    private static Bundle outState;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_write_text);
    }

    @Override
    public void onNewIntent(Intent intent) {
        int aparam=0;

        if (outState != null) {
            aparam = outState.getInt("param");
        }
        Log.i(TAG, "intent."+aparam);
      
    }

  
  


    //Activity创建或者从后台重新回到前台时被调用
    @Override
    public void onStart() {
        super.onStart();
        Log.i(TAG, "onStart called.");
    }

    //Activity从后台重新回到前台时被调用
    @Override
    public void onRestart() {
        super.onRestart();
        Log.i(TAG, "onRestart called.");
    }

    //Activity创建或者从被覆盖、后台重新回到前台时被调用
    @Override
    public void onResume() {
        super.onResume();
        Log.i(TAG, "onResume called.");
    }

    //Activity窗口获得或失去焦点时被调用,在onResume之后或onPause之后
    /*@Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        Log.i(TAG, "onWindowFocusChanged called.");
    }*/

    //Activity被覆盖到下面或者锁屏时被调用
    @Override
    public void onPause() {


        if (outState != null) {
            outState.clear();
            outState = null;
        }
        outState = new Bundle();

        outState.putInt("param", param);
        Log.i(TAG, "onSaveInstanceState called. put param: " + param);
        super.onPause();


        Log.i(TAG, "onPause called.");
        //有可能在执行完onPause或onStop后,系统资源紧张将Activity杀死,所以有必要在此保存持久数据
    }

    //退出当前Activity或者跳转到新Activity时被调用
    @Override
    public void onStop() {
        super.onStop();
        Log.i(TAG, "onStop called.");
    }

    //退出当前Activity时被调用,调用之后Activity就结束了
    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.i(TAG, "onDestory called.");
    }

    /**
     * Activity被系统杀死时被调用.
     * 例如:屏幕方向改变时,Activity被销毁再重建;当前Activity处于后台,系统资源紧张将其杀死.
     * 另外,当跳转到其他Activity或者按Home键回到主屏时该方法也会被调用,系统是为了保存当前View组件的状态.
     * 在onPause之前被调用.
     */
    @Override
    public void onSaveInstanceState(Bundle outState) {
        outState.putInt("param", param);
        Log.i(TAG, "onSaveInstanceState called. put param: " + param);
        super.onSaveInstanceState(outState);
    }

    /**
     * Activity被系统杀死后再重建时被调用.
     * 例如:屏幕方向改变时,Activity被销毁再重建;当前Activity处于后台,系统资源紧张将其杀死,用户又启动该Activity.
     * 这两种情况下onRestoreInstanceState都会被调用,在onStart之后.
     */
    @Override
    public void onRestoreInstanceState(Bundle savedInstanceState) {
        param = savedInstanceState.getInt("param");
        Log.i(TAG, "onRestoreInstanceState called. get param: " + param);
        super.onRestoreInstanceState(savedInstanceState);
    }

}