SharedPreferences简单使用案例

MainActivity：

public class SharedPreferencesTestActivity extends Activity implements View.OnClickListener{
    private EditText editText;
    private TextView textView;
    private Button write;
    private Button read;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_shared_preferences_test);
        initView();

        write.setOnClickListener(this);
        read.setOnClickListener(this);
    }

    private void initView() {
        editText=(EditText)findViewById(R.id.Edit_Test);
        textView=(TextView)findViewById(R.id.Text_Test);
        write=(Button)findViewById(R.id.write);
        read=(Button)findViewById(R.id.read);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.write:
                String some=editText.getText().toString();
                SharedPreferences pref = SharedPreferencesTestActivity.this.getSharedPreferences("data",MODE_PRIVATE);
                SharedPreferences.Editor editor = pref.edit();
                editor.putString("Content",some);
                editor.commit();
                Toast.makeText(SharedPreferencesTestActivity.this, "写入成功" , Toast.LENGTH_LONG).show();
                editText.setText("");
                break;
            case R.id.read:
                SharedPreferences pre = getSharedPreferences("data",MODE_PRIVATE);
                String name = pre.getString("Content","");
                textView.setText(name);
                Toast.makeText(SharedPreferencesTestActivity.this, "读取成功" , Toast.LENGTH_LONG).show();
                break;

        }
    }
}

MainActivity.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.fae.mobile.testActivity.SharedPreferencesTestActivity">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <EditText

            android:textColor="@color/red"
            android:background="@null"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/Edit_Test"
            android:layout_weight="1"
            />
        <TextView
            android:textColor="@color/blue"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/Text_Test"
            android:layout_weight="1"/>
    LinearLayout>
    <Button
        android:layout_marginTop="25dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/read"
        android:text="读"/>
    <Button
        android:layout_marginTop="25dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/write"
        android:text="写"/>

LinearLayout>