0

\如何在所有领域使用共享首选项？

  1. 布局 XML：

    <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="75dp" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="1." />

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="" />

    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="00:00" 
        android:layout_marginRight="10dp"/>
    <TextView
        android:id="@+id/textView11"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="00:00" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="www.google.co.in"
        android:ems="10" >

        <requestFocus />
    </EditText>
</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="75dp" >

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="2." />

    <CheckBox
        android:id="@+id/checkBox2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="" />

    <TextView
        android:id="@+id/textView7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="10dp"
        android:text="00:00" />
    <TextView
        android:id="@+id/textView12"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="00:00" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="www.yahoo.co.in"
        android:ems="10" />

</LinearLayout>


        <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_margin="10dp"
        android:layout_weight="0.11"
        android:text="WebView" />
</LinearLayout>

  2. 主要活动

包 com.example.myproject5；

import android.app.Activity;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TimePicker;

public class MainActivity extends Activity {
    private TextView tv6, tv7, tv11, tv12;
    private EditText et1, et2;
    private CheckBox cb1, cb2;
    private Button submit, webview;
    private int hour;
    private int minute;
    public static final String PREFS_NAME = "MyPrefsFile";
    private static final int TIME_DIALOG_ID = 1;
    private static final int TIME_DIALOG_ID1 = 2;
    private static final int TIME_DIALOG_ID2 = 3;
    private static final int TIME_DIALOG_ID3 = 4;
    int cur = 0;
    private SharedPreferences loginPreferences;
    private SharedPreferences.Editor loginPrefsEditor;
    private int savelogin;

    @SuppressWarnings("deprecation")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv6 = (TextView) findViewById(R.id.textView6);
        tv7 = (TextView) findViewById(R.id.textView7);
        tv11 = (TextView) findViewById(R.id.textView11);
        tv12 = (TextView) findViewById(R.id.textView12);
        et1 = (EditText) findViewById(R.id.editText1);
        et2 = (EditText) findViewById(R.id.editText2);
        cb1 = (CheckBox) findViewById(R.id.checkBox1);
        cb2 = (CheckBox) findViewById(R.id.checkBox2);
        submit = (Button) findViewById(R.id.button1);
        webview = (Button) findViewById(R.id.button2);
        tv6.setEnabled(false);
        tv7.setEnabled(false);
        tv11.setEnabled(false);
        tv12.setEnabled(false);
        et1.setEnabled(false);
        et2.setEnabled(false);

        loginPreferences = getSharedPreferences(PREFS_NAME, 0);
        savelogin = loginPreferences.getInt("abc", 0); // save data
        if (savelogin == 1) {
            tv6.setText(savelogin);
        } else if (savelogin == 2) {
            tv7.setText(savelogin);
        } else if (savelogin == 3) {
            tv11.setText(0);
        } else if (savelogin == 4) {
            tv12.setText(0);
        }

        cb1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                if (cb1.isChecked()) {
                    tv6.setEnabled(true);
                    tv11.setEnabled(true);
                    et1.setEnabled(true);
                } else {
                    tv6.setEnabled(false);
                    tv11.setEnabled(false);
                    et1.setEnabled(false);
                }

            }
        });
        cb2.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                if (cb2.isChecked()) {
                    tv7.setEnabled(true);
                    tv12.setEnabled(true);
                    et2.setEnabled(true);
                } else {
                    tv7.setEnabled(false);
                    tv12.setEnabled(false);
                    et2.setEnabled(false);
                }

            }
        });
        tv6.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog(TIME_DIALOG_ID);
                loadpreferences1("abc", 1);
            }
        });
        tv7.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog(TIME_DIALOG_ID1);
                loadpreferences1("abc", 2);

            }
        });
        tv11.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog(TIME_DIALOG_ID2);
                loadpreferences1("abc", 3);

            }
        });
        tv12.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog(TIME_DIALOG_ID3);
                loadpreferences1("abc", 4);

            }
        });

        submit.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });

        webview.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this, second.class);
                startActivity(intent);
                loadpreferences1("abc", 5);
            }
        });

    }

    protected Dialog onCreateDialog(int id) {
        switch (id) {
            case TIME_DIALOG_ID:
                cur = TIME_DIALOG_ID;
                return new TimePickerDialog(this, timePickerListener, hour, minute, true);

            case TIME_DIALOG_ID1:
                cur = TIME_DIALOG_ID1;
                return new TimePickerDialog(this, timePickerListener, hour, minute, true);

            case TIME_DIALOG_ID2:
                cur = TIME_DIALOG_ID2;
                return new TimePickerDialog(this, timePickerListener, hour, minute, true);

            case TIME_DIALOG_ID3:
                cur = TIME_DIALOG_ID3;
        }
        return null;
    }

    private TimePickerDialog.OnTimeSetListener timePickerListener = new TimePickerDialog.OnTimeSetListener() {
        public void onTimeSet(TimePicker view, int selectedHour, int selectedMinute) {
            hour = selectedHour;
            minute = selectedMinute;
            if (cur == TIME_DIALOG_ID) {
                tv6.setText(new StringBuilder().append(pad(hour)).append(":").append(pad(minute)));

            } else if (cur == TIME_DIALOG_ID1) {
                tv7.setText(new StringBuilder().append(pad(hour)).append(":").append(pad(minute)));
            } else if (cur == TIME_DIALOG_ID2) {
                tv11.setText(new StringBuilder().append(pad(hour)).append(":").append(pad(minute)));
            } else if (cur == TIME_DIALOG_ID3) {
                tv12.setText(new StringBuilder().append(pad(hour)).append(":").append(pad(minute)));
            }

        }
    };

    private static String pad(int c) {
        if (c >= 10)
            return String.valueOf(c);
        else
            return "0" + String.valueOf(c);
    }

    private void loadpreferences1(String str, int in) {
        loginPreferences = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
        loginPrefsEditor = loginPreferences.edit();
        loginPrefsEditor.putInt(str, in);
        loginPrefsEditor.commit();
    }

}
4

1 回答 1

0

根据您的要求，使用这些方法从应用程序更改参数的任何位置保存和获取值

这种方法可以在共享偏好中保存价值

public static void setPref(Context c, String pref, String val) {
    Editor e = PreferenceManager.getDefaultSharedPreferences(c).edit();
    e.putString(pref, val);
    e.commit();
}

这种从共享偏好中获取价值的方法

public static String getPref(Context c, String pref, String val) {
    return PreferenceManager.getDefaultSharedPreferences(c).getString(pref,
            val);
}
于 2013-08-30T05:40:16.343 回答